Re: [OSM-talk] South Sudan, the world's newest Country

[bernhard zwischenbrugger]

hi


You should fine most of what you need there, especially from the IMWG 
and UNSudanIG sections. Note however the north/south border is in 
dispute in several areas. To the final question, at present there is a 
North and South Kordofoan and Sudan is retaining both, though the 
southern border of South Kordofan is partially disputed. Your 
colleague can contact me directly for further questions as needed.


Boundaries: 
http://www.cern.ch/unosat-sdn/data/vector/shp/undp_ss_county.zip

I tried to convert the shp file to osm, but no success.
The tools listed here:
http://wiki.openstreetmap.org/wiki/Shp2osm
are not working on my computer.

Bernhard



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Re: [OSM-talk] We Need to Stop Google's Exploitation of Open Communities

[Bernhard Zwischenbrugger]

If you don't mind about being open, why are you not just using
Google's data already?


Hello,

thank you for your insightful comment, I will move immediately to 
Google and start using their data directly. Can you point out to me 
where I can access their data so I can make an efficient use of them?

Where can I access the OSM data?

I know it is possible to download the hole planet, setup a database,... 
but that's not an easy task.


I'm a teacher and my students are able to load data from an API and 
display the data on a map.

Last year we did some projects using XAPI - but then xapi was broken.

We had about 100 API Requests per week. For that amount of requests it 
makes no sense to have a local copy of the db.

But without db we are not able to read osm data.

Without data everything is tile based and that's the same as google and 
bing are offering.

MapQuest is offering XAPI now - but will it still be available in 2 month?

Bernhard
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Re: [OSM-talk] [HOT] Nametagging: Local script versus "international" latin script (for Libya)

[Bernhard Zwischenbrugger]

Mapnik is still not able to render Khmer fonts without mistakes.

Is this an issue with Mapnik or due to missing fonts?

Khmer Font exists but letter spacing is wrong and there are wrong 
rectangles around some letters.


Lao rendering is ok, Thai fonts are too small, Myanmar fonts also have 
problems with letter spacing, the letter "ြ" for example is rendered too 
big - but I can't read Burmese.


Bernhard
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Re: [OSM-talk] [HOT] Nametagging: Local script versus "international" latin script (for Libya)

[Bernhard Zwischenbrugger]

hi

We might end-up having to keep int_name for the internationally used
name, even if it is a somewhat fuzzy definition - and then add a
name:romanized or romanized_name tag for the romanized transliteration
of the local name.


I can't understand Arabian. I'm no expert. Is there a way to do the 
transliteration automatically in a consistent way?

Acconding to wikipedia there exist multiple ways to do so:
http://en.wikipedia.org/wiki/Arabic_transliteration
I'm also not able to read Arabic, but I'm able to read some Asian 
writing systems.


Lets take "Bangkok" for example.

The City is called:

? (/Krung Thep Mahanakhon)/
Most of the people there call it "Krung Thep"
There is also a long (offical) name:
"? ??? ??? 
 ?? ??? ? 
 ??"


Lets cross the border to Laos
In Laos Bangkok is also called "Krung Thep". If people don't speak 
English, they don't know the name "Bangkok".
Laos has it's own writing system an the Lao transliteration of Bangkok 
is "??".


Next country Cambodia - Khmer writing system:
 = krung thep
? = bangkok

Sound file:
http://en.wikipedia.org/wiki/File:Th-Krung_Thep.ogg
---
3 countries 3 writing systems. I don't see an international name.
Maybe the name as written at the airport could be the int_name.

name:?
name_offical:? ??? ??? 
 ?? ??? ? 
 ??

name_en:Bangkok
name@lo:??
name_lo:don't know (There is no "R" in Lao)
name@km:
name_km:?
name@de:Krung Theep
name@en:Krung Thep
name_int:Bangkok

name@ipa: kru-? t^(h)ê?p máha(? nák^(h)???n 



---
name:"? (Bangkok)"
is definitly wrong. If I want to render a bilingual map it is not 
possible - except I make an English/Thai map. It is not possible to 
render a Thai/Lao map or a Thai/Chinese map.

---
There isn't an offical transliteration system for every writing system.
Laos and Cambodia have been French colonies. In Cambodia they have an 
official translitaration system based on english pronunciation.
For me as a German speaking person the English based transliteration is 
nearly useless.
In Laos they use more often the French sounds of Latin letters - but 
there is no official transliteration system.


In Cambodia I have never seen a map using Khmer letters, but it is easy 
to buy a Cambodian map with English letters. The local people have no 
maps if they are not able to read English. The Khmer alphabet has 70 
letters. Transliteration is not possible without losses.

Mapnik is still not able to render Khmer fonts without mistakes.

Bernhard


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Re: [OSM-talk] Why isn't any XAPI server available ?

[Bernhard Zwischenbrugger]

hi
I must admit that I didn't know that there was a working instance of 
TRAPI - I thought it was just a proposal.

How do I connect to a trapi server?
Is there a public server?
I can find a description of the service but not an url.


 This is tried:


 503 Service Unavailable


http://api1.osm.absolight.net/api/0.6/map?tile=18/142974/90898

Bernhard

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Re: [OSM-talk] Wanted: a live-edit viewing thingalabong

[Bernhard Zwischenbrugger]

Hi

I don't know exactly what you are looking for, but do you know

http://khtml.org -> Ticker

and

http://www.khtml.org/osm/v0.83/examples/changes.html


Bernhard

On 2010-11-05 20:19, Ævar Arnfjörð Bjarmason wrote:

I have a logfile of lat/lon coordinates alll over the world that I
want to tail, feed to a webservice and view in a browser.

I thought I could use some of the existing live-edit thingy. So far
I've found http://matt.dev.openstreetmap.org/owl_viewer/ (aimed at
local) and 
http://searchengineland.com/new-real-time-google-maps-edits-in-new-edits-viewer-13220
which is down at the moment.

Is there something existing out there that I can steal and hook up to
some trivial AJAX service that'll zoom around the map as new edits
come in for some "whoo" factor?

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Re: [OSM-talk] New: Mobile Map for Android and iPhone

[Bernhard Zwischenbrugger]

On 2010-10-22 17:07, Dave F. wrote:

On 22/10/2010 11:42, Bernhard Zwischenbrugger wrote:


Android:
For zoom in/out the map you have 2 buttons. This will zoom the map 
center.




So I assume it can't deal with hand gestures?


Android Browser gives only the position of one finger to javascript.
If you move the finger on the touch screen it is used for moving the map.

I'm sorry - but gestures like zooming with two fingers are not possible 
in Android <=2.2.

Maybe that will change in 3.0.

There are some applications in the app store that are using more than 
one finger position.

For testing there is for example "MultiTouch Tester".

If should be possible to enable multitouch in future version of firefox 
for example - but it's not done yet.


Bernhard

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[OSM-talk] New: Mobile Map for Android and iPhone

[Bernhard Zwischenbrugger]

Hi all

I made a map with GPS and Nominatim for Android and iPhone.
It is a WebApplication that lives in the Browser.

On iPhone you can add the map to the home screen to make it fullscreen.

How to open:
-

Just type

http://khtml.org

in your mobile browser URL field.

You don't have to install it - it's a normal web page.

Using the touchscreen :


drag/drop: move the map
doubleclick: zooms in at the click position

iPhone:
On iPhone you have multitouch to zoom in/out

Android:
For zoom in/out the map you have 2 buttons. This will zoom the map center.

GPS:
---
There is a button that allows you to find your own position.
The location service on your mobile phone must be enabled to use this 
function.


The geolocation will try to use real GPS signal from satellite.
If you are in a building the map tries to find the position using
the signatures of wifi stations or GSM base stations.

Nominatim:
--
Press the "search" button and type the place you search for.
There is NO list of search results as on the osm.org page.
It will take the first result an the map jumps to this position.

If you search for example for "vienna" vienna in Austria will show up
in the map. If you look for vienna in the states type "vienna usa" for 
example.


Bugs:
-
I have tested on Motorola Milestone and iPhone 3GS iOS 3.1.2.
If you find bugs please let me know.

Mobile Opera and Mobile Firefox (fennec) don't have touch events and the 
map does not work.


have fun

Bernhard

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Re: [OSM-talk] iPad app

[bernhard zwischenbrugger]

Am 21.08.10 19:01, schrieb Toby Murray:

On Sat, Aug 21, 2010 at 11:09 AM, bernhard zwischenbrugger
  wrote:
   

The userinterface for Android and iPad/iPhone can't be the same.
Android does not support multitouch.
 

My Samsung Galaxy S strongly disagrees with this statement :)

Some early android devices didn't do multitouch but I think most of
the current ones do.


   

The newest Android Phone I tried was the HTC Legend.
It supports Pinch to Zoom but no Multitouch in Browser (Android 2.1)

It's not a hardware problem. Even the HTC Hero hardware is able to detect
the position of more than one finger.
There are also Apps that supports Multitouch, but not the Android Browser.

Bernhard


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Re: [OSM-talk] iPad app

[bernhard zwischenbrugger]

Am 20.08.10 21:17, schrieb John Smith:

On 21 August 2010 05:12, bernhard zwischenbrugger  wrote:
   

But editing with a touchscreen is not easy.
How to set a point using a finger?
If you put the finger to the screen, you don't see where the point is set.
The finger covers the point and it can't be exact.

Any idea how to solve this problem?
 

Cross hairs on the screen and then move the screen/cross hairs to the
place you really wanted it to be...
   
I started to make an html vector editor. It's a really early prototype 
and maybe it will not work on all platforms:


http://www.khtml.org/osm/v0.79/examples/edit.html

The base map (http://khtml.org) should work on iPad (incl. multitouch) 
but I don't have an iPad and could only test on iPhone.
For vector editing I didn't add touch support but mouse events are 
supported for move nodes.

It uses SVG and on Android it will not work - there is no SVG on Android.

The crosshair idea is really good, but solves only one part of the UI.

The userinterface for Android and iPad/iPhone can't be the same.
Android does not support multitouch.

Maybe someone could draw a userinterface.


Bernhard




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Re: [OSM-talk] iPad app

[bernhard zwischenbrugger]

hi

I keep thinking an editing app for the 3G / wifi iPad would be awesome. It's 
always on the network, GPS and compass are built in.

It would be a sweet surveying device, but would have to be super fault tolerant 
in doing things like waiting for the network.

   

Collecting gpx files would be easy.

But editing with a touchscreen is not easy.
How to set a point using a finger?
If you put the finger to the screen, you don't see where the point is set.
The finger covers the point and it can't be exact.

Any idea how to solve this problem?

Bernhard


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Re: [OSM-talk] OSM Live Ticker

[bernhard zwischenbrugger]

hi

Sometimes it's a bit delayed because of a problem with
delayed minute diffs (http://planet.openstreetmap.org/minute-replicate/)
 

Perhaps the "replay" could be a bit faster. I think, that as it is now the
delay will never get smaller again.

   

Now one hour has 54 minutes at  http://khtml.org live ticker.

Bernhard

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Re: [OSM-talk] OSM Live Ticker

[bernhard zwischenbrugger]

hi

Whoot, then I can finalize the KHTML interface I'd like to present (and
which is 80% ready).
   
There are many changes and the documentation is outdated (all the vector 
code is new).


As I remember you was interested in the distance tool and you wanted to 
show the lat,lng at mouse position.


Here some examples:

Naked map:
http://www.khtml.org/osm/v0.76/examples/simple.html

Coordinates at mouse position:
http://www.khtml.org/osm/v0.76/examples/mousegps.html

Distance Tool:
http://www.khtml.org/osm/v0.76/examples/measure.html

GPX is also supported now:
http://www.khtml.org/osm/v0.76/examples/gpx2.html

The version at github is also outdated.
All my computers are broken and I'm working on a borrowed computer now.
That makes everything a bit difficult.

All this examples are free (LGPL), feel free to use.

Bernhard


Thanks Bernhard

  Fri, 2010-08-13 at 20:53 +0200, Igor Brejc wrote:
   

Nice!

On Fri, Aug 13, 2010 at 8:39 PM, bernhard zwischenbrugger
  wrote:
 Hi all

 I made an OSM Live Ticker at http://khtml.org ->ticker

 The edits are displayed on a slippy map. You can zoom in, out
 and move the map.
 You can also click on the symbols and view the tags.

 Sometimes it's a bit delayed because of a problem with
 delayed minute diffs
 (http://planet.openstreetmap.org/minute-replicate/)

 Bugreports are welcome.

 have fun

 Bernhard

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[OSM-talk] OSM Live Ticker

[bernhard zwischenbrugger]

Hi all

I made an OSM Live Ticker at http://khtml.org ->ticker

The edits are displayed on a slippy map. You can zoom in, out and move 
the map.

You can also click on the symbols and view the tags.

Sometimes it's a bit delayed because of a problem with
delayed minute diffs (http://planet.openstreetmap.org/minute-replicate/)

Bugreports are welcome.

have fun

Bernhard

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Re: [OSM-talk] Mathematic genius needed

[Bernhard zwischenbrugger]

Thanks for input - it's done.




   this.setBounds=function(b){
this.normalize();
//the setbounds should be a mathematical formula and not 
guessing around.
//if you know this formula pease add it here.
//this.getSize();
var p1=b.getSW();
var p2=b.getNE();

var minlat=p1.getLat();
var maxlat=p2.getLat();
var minlng=p1.getLng();
var maxlng=p2.getLng();

var minlat360=lat2y(minlat);
var maxlat360=lat2y(maxlat);
var centerLng=(minlng+maxlng)/2;
var centerLat360=(minlat360 + maxlat360)/2;
var centerLat=y2lat(centerLat360);
var center=new kPoint(centerLat,centerLng);
var extendX=Math.abs(maxlat360 - minlat360);
var extendY=Math.abs(maxlng - minlng);
if(extendX / this.width < extendY / this.height){
var extend=extendX;
var screensize=this.width;
}else{
var extend=extendY;
var screensize=this.height;
}
//alert(extend);
//zoomlevel 1: 512 pixel
//zoomlevel 2: 1024 pixel
//...
//extend = 360 > zoomlevel 1 , at 512px screen
//extend = 360 > zoomlevel 2 , at 1024px screen

//extend at zoomlevel1: extend/360 * 512px
var scalarZoom=360/extend;
var screenfaktor= 512/screensize;
var zoom=(Math.log(scalarZoom / 
screenfaktor))/(Math.log(2)) ;

if(zoom > 18){
zoom=18;
}
if(zoom < 1){
zoom=1;
}
this.setCenter2(center,zoom);

}





Iván Sánchez Ortega schrieb:
> El 22/03/2010 4:20, Bernhard zwischenbrugger escribió:
>> Given:
>> wgs84: minlat, minlon, maxlat, maxlon
>> screen: width, height
>>
>> Needed:
>> lat,lng, center
>
> http://trac.openlayers.org/browser/trunk/openlayers/lib/OpenLayers/Control/ZoomBox.js
>  
>
>
>
> Cheers,


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Re: [OSM-talk] Mathematic genius needed

[Bernhard zwischenbrugger]

John Smith schrieb:
> On 22 March 2010 15:09, Bernhard zwischenbrugger  wrote:
>   
>> Sorry:
>> Southwest: 0,0
>> Northeast: 90,180
>> 
>
> Are you after the middle WGS points or the middle points on a mercator grid 
>   
The 2 points must be converted to mercator.
In mercator the middle point is calculated.
After that there must be a conversion to WGS84 again.


My method call should be:
map.setBounds(southwest, northeast);

Think about a gpx line that should be shown on the map.

The formula should deliver values for
map.setCenter(center, zoom); //center is a point in WGS84.

Bernhard




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Re: [OSM-talk] Mathematic genius needed

[Bernhard zwischenbrugger]

Small correction:
>> I think your problem is more fundamental; because min and max are not
>> going to work ;) lefttop, righttop, leftbottom, right bottom are.
>>   
>> 
> Good Point you are right on that.
> I have 2 Points in WGS84:
>
> Southeast (example 0,0)
> Northwest (example 90, 180)
>   
Sorry:
Southwest: 0,0
Northeast: 90,180

Bernhard
> A Mercator projection will result in a y value of infinite for this example.
> Not easy ...
>   


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Re: [OSM-talk] Mathematic genius needed

[Bernhard zwischenbrugger]

Stefan de Konink schrieb:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA512
>
> Op 22-03-10 04:20, Bernhard zwischenbrugger schreef:
>   
>> Hint:
>>
>> At first you maybe think
>> centerLat = (minlat + matlat)/2;
>> centerLng = (minlng + matlng)/2;
>> could be the solution.
>>
>> But that does not give the correct result.
>> The center must be the center in screen coordinates.
>> 
>
> I think your problem is more fundamental; because min and max are not
> going to work ;) lefttop, righttop, leftbottom, right bottom are.
>   
Good Point you are right on that.
I have 2 Points in WGS84:

Southeast (example 0,0)
Northwest (example 90, 180)

A Mercator projection will result in a y value of infinite for this example.
Not easy ...



Bernhard






>
> Isn't it the idea:
>
> (max - min) / 2?
>
> You propose it the opposite.
>
> Its late, but I hope you have something for what I have attached.
>
>
> Stefan
> -BEGIN PGP SIGNATURE-
> Version: GnuPG v2.0.14 (GNU/Linux)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
>
> iEYEAREKAAYFAkum5mcACgkQYH1+F2Rqwn0WQQCdHP9rKyyaU7W9RddU8L9QV+ej
> 2j0AnRrVBjbeRwZDtGhn8d1Wk14RZZ63
> =DdMd
> -END PGP SIGNATURE-
>   
>
> 
>


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Re: [OSM-talk] Mathematic genius needed

[Bernhard zwischenbrugger]

hi
> How about converting to UTM then using a zoom level specified as 
> meters per pixel?
>
> Here is what I did when printing from Mapnik:
>
> http://www.britishideas.com/2009/09/22/map-scales-and-printing-with-mapnik/ 
>

I don't know UTM.

If a globe is displayed on a 2D medium some things appear bigger than 
others.
As far I have seen in wikipedia, that's also in UTM coordinate system.
(greenland gets too fat)
see: http://wiki.openstreetmap.org/w/images/4/4a/Scale.png

UTM solves this problem for latitude (y-coordinate) in a different way 
than the normal osm projection.

You write that 0.00028m is one pixel.
But is that true for equator AND northpole?

Is your formula also working on low zoomlevels?

Bernhard

>
> Andy
>
> Bernhard zwischenbrugger wrote:
>> Hi all
>>
>> Maybe that one is easy for someone out there, for me it's unsolvable.
>>
>> I have
>> minlat, minlon, maxlat, maxlon
>> That describes an area in WGS84
>>
>> The area should be placed on the screen.
>> To place it on the screen, I need the centerlat,centerlng and the 
>> zoomlevel.
>>
>> To be shorter on that:
>>
>> Given:
>> wgs84: minlat, minlon, maxlat, maxlon
>> screen: width, height
>>
>> Needed:
>> lat,lng, center
>> -
>>
>> Hint:
>>
>> At first you maybe think
>> centerLat = (minlat + matlat)/2;
>> centerLng = (minlng + matlng)/2;
>> could be the solution.
>>
>> But that does not give the correct result.
>> The center must be the center in screen coordinates.
>>
>>
>> Bernhard
>>
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>>
>>
>>


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[OSM-talk] Mathematic genius needed

[Bernhard zwischenbrugger]

Hi all

Maybe that one is easy for someone out there, for me it's unsolvable.

I have
minlat, minlon, maxlat, maxlon
That describes an area in WGS84

The area should be placed on the screen.
To place it on the screen, I need the centerlat,centerlng and the zoomlevel.

To be shorter on that:

Given:
wgs84: minlat, minlon, maxlat, maxlon
screen: width, height

Needed:
lat,lng, center
-

Hint:

At first you maybe think
centerLat = (minlat + matlat)/2;
centerLng = (minlng + matlng)/2;
could be the solution.

But that does not give the correct result.
The center must be the center in screen coordinates.


Bernhard

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Re: [OSM-talk] What do you wish you'd known?

[Bernhard zwischenbrugger]

hi
> What are the thing or things you know know that you wish you'd known when you 
> started with OpenStreetMap?
>   
I use the OSM tiles to teach javascript.
2 for loops for x,y and absolute positioning delivers a big map.
That's cool.

For moving the map there are mouse events nessessary.
And i can teach the mouse events.

But than it switches to a completely different coordinate system.
To use webservices that gives wgs84 from a place name is easy.

But how to do the gps to xy transformations?

I found some really nice formulas in the wiki, but it took a year or two 
until I found it.
At the moment I search a bounds to center+zoom formula (no easy). I 
think I have seen it
in the wiki, but can't find it anymore.

If there would be an easy to find place with all the mathematical thing 
it would be very nice.


bernhard


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Re: [OSM-talk] [OSM-dev] Wishes

[Bernhard zwischenbrugger]

hi

thanks to John Smith the upload is working now.

If you have an iphone, type
http://khtml.org
to the safari url line.

click "REC"
walk around
click "upload"

At the moment it's all with one account.
You will find the traces here:
http://api06.dev.openstreetmap.org/traces

oAuth will follow

Bernhard




John Smith schrieb:
> On 19 March 2010 00:21, Bernhard zwischenbrugger  wrote:
>   
>> GPX is XML and there is no need for multipart/form-data upload.
>> 
>
> GPX might be XML, but it's not HTTP, and if you want to upload a file
> over HTTP you need to talk multipart/form...
>
>   
>> To debug that kind of uploads is not possible.
>> 
>
> There is plenty of ways to debug, just like everything else it's a
> skill set, in this case you need to sniff packets...
>
>$user = 'username';
>   $pass = 'password';
> $file = '/tmp/filename.gpx';
>
>   $url = "/api/0.6/gpx/create";
>
>   $file = trim($file);
>   if($file == '')
>   continue;
>
>   if(!file_exists($file))
>   continue;
>
>   $boundary = '--'.sha1(date("U").$fn.rand(0, date("U")));
>   $fn = md5(basename(date("U").$file.$boundary));
>   $cmd = "grep '   $trackpoints = trim(`$cmd`);
>
>   if($trackpoints >= 300)
>   {
>   $body = "";
>   $fn .= '.gpx';
>   $data = gzencode(file_get_contents($file));
>
>   $body .= '--'.$boundary."\r\n";
>   $body .= "Content-Disposition: form-data; name=\"file\";
> filename=\"$fn.gz\"\r\n\r\n";
>   $body .= $data."\r\n";
>   $body .= '--'.$boundary."\r\n";
>   $body .= "Content-Disposition: form-data; 
> name=\"description\"\r\n\r\n";
>   $body .= "uploaded route.\r\n";
>   $body .= '--'.$boundary."\r\n";
>   $body .= "Content-Disposition: form-data; 
> name=\"tags\"\r\n\r\n";
>   $body .= "automatic_upload ".date("Y F")."\r\n";
>   $body .= '--'.$boundary."\r\n";
>   $body .= "Content-Disposition: form-data; 
> name=\"public\"\r\n\r\n";
>   $body .= "1\r\n";
>
>   $body .= '--'.$boundary."--\r\n";
>
>   $head  = "POST $url HTTP/1.1\r\n";
>   $head .= "host: www.openstreetmap.org\r\n";
>   $head .= "Transfer-Encoding: 8bit\r\n";
>   $head .= "Authorization: Basic 
> ".base64_encode($user.':'.$pass)."\r\n";
>   $head .= "Content-Length: ".strlen($body)."\r\n";
>   $head .= "Content-type: multipart/form-data; 
> boundary=$boundary\r\n";
>   $head .= "Connection: close\r\n\r\n".$body;
>   //echo $head;
>
>   if(($fp = @fsockopen("www.openstreetmap.org", 80)) === 
> FALSE)
>   continue;
>
>   fputs($fp, $head);
>   $line = $lastline = "";
>   $start = false;
>   while(!feof($fp))
>   {
>   $line = trim(fgets($fp));
>   if($start == false && $line == '')
>   {
>   $start = true;
>   continue;
>   }
>   if($start == false)
>   continue;
>
>   $id = $line;
>   break;
>   }
>   fclose($fp);
>   if($id <= 0)
>   continue;
>   }
>   


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[OSM-talk] Announcement: javascript map library "khtmlib"

[Bernhard zwischenbrugger]

Announcement: javascript map library "khtmlib"

The first beta version (code name: phnom penh) of the new khtmlib 
library is online now.
It's a completely new development and is indepented of openlayer, google 
maps and co.


Try it:
http://www.khtml.org/

Project home:
http://github.com/robotnic/khtmlib

Licence: LGPL - feel free to use in commercial projects.

Features:
The library has an object oriented API.
Main goal of the library is speed.
At the moment only mapnik tiles are supported.
Simple overlays (point, path, area) are supported.

API doc:
http://www.khtml.org/iphonemap/help.php
(doc will move to the wiki)

Browser Support:
Webkit (Chrome, Safari, Safari iPhone): very fast
Opera: 10.50 is very fast (not realy tested)
Firefox: much slower than webkit
Internet Explorer: Not supported (evt.pageX,...),

User Interface Desktop:
zoom: mousewheel, doubleclick, -mouse (draws rectangle for zoom)
move: mouse

User Interface iPhone:
zoom: mulitouch, doubleclick
move: touchscreen one finger

ToDo:
cyclemap, t...@h support;
tile layers;
markers;
keyboard support;
...

Download:
http://github.com/robotnic/khtmlib/archives/master

--

The example page:
http://www.khtml.org/
This is an example how to use the library. This page is not free software.
You can have a look at the source and copy parts of it, but please don't
copy the page and put it online.
Features:
Namefinder, undo, redo, geolocation, distance measuring tool, fullscreen

Links:
edit current map view in potlatch and josm,
qr-code for open the current map view in iPhone,
link page for opening the current view in google, bing,... map.

--

Bugreports:
If you find bugs, please add a bugreport at:
http://github.com/robotnic/khtmlib/issues
Bugreports are very welcome.
If you miss features please also add a bugreport.
Bugreports by email are also welcome, but I have many
 mails in my inbox and reports get lost for sure.


Help:
If you want to help, there are many things to do:

1.) Internet Explorer support.
That should be relative easy if you are able to debug javascript.
I don't have windows here and can't debug.

2.) Markers
Have a look at google maps API and do something like that.

3.) TileServer
At the moment only mapnik is supported.
It should be very easy to support other tile servers.
Have a look at google or openlayer API.

4.) Keyboard support
Make a list of keyCodes and the corresponding actions.

5.) Try to use the API and document it at the github WIKI
at github
http://wiki.github.com/robotnic/khtmlib/


Commercial support:
bernhard zwischenbrugger
bz(@)datenkueche.com


have fun

Bernhard

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Re: [OSM-talk] Student Project Ideas?

[Bernhard zwischenbrugger]

Hi

I have a project:
If you have nothing else just copy/paste from snip to snap and correct 
my bad english.

---snip---
title: It's about zooming the browser maps...

The javascript map library khtmlib is a free library to display maps in 
browsers.
It has a simple API to display map tiles at the browser window in a very 
fast way.
Also the simple vector graphics circle, path and area are supported.
The API provides a complete WGS84 cordinate system and frees programmers
of thinking in screen x,y coordinates.

Browsers like webkit or opera are doing this job quiet well but  webkit 
has a bad bugs with  image loading.
Firefox is slow, but I'm sure it will change.

To have a fast javascript browser map that can easily compete with 
google or bing map will be the result of this project.

The way to get a fast map is  benchmarking and that is this GsoC Projekt

Our unit is frames per second!
Most of the map libs and browsers are able to move the map
in a usable or smooth way.
To win a new dimension in map browsing we need the z-Axis. Also smooth 
rendered.
A nice, responsive, smooth zoom opens a new intuitive way to explore the 
world.

Like in video games we have a more usable map if we have more frames per 
second.
Most of the computers have the hardware to show perfect frame rates.
 From javascript to the screen, there are some problems.

This library has an interface to measure frames per seconds. It was used 
to opitimice speed while developing.

the project details===

Automatic Banchmark tests:
Calling the API in a loop is easy done in a for loop. Counting from 
1..18 in small steps can result in a zoom and 1000 frames.

o moving the map
o zooming the map
(o caching)

Parameter:
10,100,1000,1 vektor lines, areas, circles
Map size on screen
Hardware!
Browser (navigator.userAgent)

Visual feedback:
The tester should see the map and should be able to judge about the 
behavior of the browser.
Is flickering...

Some browsers are cheating. Pointer devices deliver lots of events and 
every event is a task. Now it's programming with parallel tasks and to 
have good speed, serializing is nesessary. To serialize this tasks is 
not easy. Firefox starts extra tasks to render images and gives a 
success message bevor the work is done.
It can result in flickering image or speed penalty  the automatic test 
does not recognice.

API Dokumentation
The API should be documented in a half automatic way. (grep 
this.xyyx=function in js)

Collecting results:
Like other browser benchmark tests, this test can be done by many users.
For collecting results, there must be an AJAX feedback collector.
This feedback should be generated without user action.
The user must be able to add more information and send it to a central 
db (one click).
As a result of this action, the result will be displayed on a ranking.
There must also be an administrator option to delete entries.
A Highscore in gameboy or what ever design! would be ok.

If there are many Chrome on the  top of the list, it's very likely that 
Chrome is the fastest browser.
To prevent manipulation a simple ip based system should be ok. 1 IP == 1 
Result.
(ignoring proxys,...)
If the test provides a faster benchmark result on this IP adress, the 
faster result overwrites the slower.

Graphics:

Display vector data on browser is not widly used because of Internet 
Explorer is blocking SVG.
For map data it is essential.
There must be a diagram that showed the framerate and the number of 
lines in an x,y diagram.


The library:
(I made this library and did put it under GPL)

The library khtmlib is not perfect at all. It's buggy but fast.
At least it is a prove of concept.



To see it live go to:

Please use Chrome 5 (faster than 4), Safari or Opera 10.50 (windows). 
Try to zoom on cached tiles.
http://www.khtml.org/iphonemap/

Project Home:
http://github.com/robotnic/khtmlib

---snap

Firefox does not provide the same speed at the moment. Internet Explorer 
does not work at all (evt.pageX).
I'm working here on a netbook and have no idea how it works in 
fullscreen on a 24" monitor.

That's my project idea. A benchmark test for my map lib.
Maybe it's also help for the programmer of this lib to make it really good.
In a few days I hope to have some more documentation and I will give 
more informations about the khtmlib.

Btw. I'm still in Phnom Penh but in a few days I will continue traveling 
to Laos.


Bernhard











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[OSM-talk] Licence Information best practice

[Bernhard zwischenbrugger]

Hi all

Is there a html snippet somewhere, that shows the OSM licence information?
The map at http://osm.org does not show licence information inside the 
slippy map.

I want to add that to my map.
But I want it to be very small (not too much pixel).
The user wants to see that map not the licence.

A small OSM logo would be very nice.

Bernhard




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Re: [OSM-talk] Tile caching (osm startpage)

[Bernhard zwischenbrugger]

Hi

That was a long mail.

How about some lines in apache setup?

cache: 1 year
rest: same as www.osm.org




For me I solved the tile cache problem I had here in Phnom Penh.
I have a super fast proxy.

The actual problem:

I made a javascript map library for webkit that is much faster than 
openlayers.
Navigation is more visual and namefinder is not so important anymore.
But to have a good visual experience, the tiles should be in cache.
Using my proxy I can really see the difference.
The fast zoom gives a new dimension and more tiles are needed.

conclusio
A tileserver with longer cache time would be nice.


Bernhard


Kai Krueger schrieb:
> On 01/-10/-28163 08:59 PM, Michal Migurski wrote:
>   
>> On Mar 5, 2010, at 11:34 AM, John Smith wrote:
>>
>> 
>>> On 6 March 2010 01:24, Bernhard zwischenbrugger  
>>> wrote:
>>>   
>>>> Google Cache Time:
>>>> Cache-Control: public, max-age"22  //feels like one month (I
>>>> didn't calculate)
>>>> 
>>> I'd say it's a bad idea to specify a cache time, instead there is
>>> other caching mechanisms to tell if a tile has changed:
>>>
>>>   
>>>> ETag: "d096ddafba32c0da609007e224530ccd"
>>>> 
>>> This way if a tile never changes you never need to refresh.
>>>   
>> For what it's worth, the current tile server does specify a cache time as 
>> well as an ETag.
>>
>> % curl -sI "http://tile.openstreetmap.org/14/2627/6331.png";
>>  HTTP/1.1 200 OK
>>  Date: Sun, 07 Mar 2010 02:19:30 GMT
>>  Server: Apache/2.2.8 (Ubuntu)
>>  ETag: "93087c5713c17d9939cac9e341fdd14c"
>>  Content-Length: 26595
>>  Cache-Control: max-age36
>>  Expires: Sun, 07 Mar 2010 02:36:46 GMT
>>  Content-Type: image/png
>>
>> 1,000 sec. max age there is a little over 15 minutes, though when I repeat 
>> this request I get expiry times all over the place, from a few minutes to 
>> many hours. What currently decides on the cache expiration time?
>> 
>
> mod_tile, the apache module used to server the tiles, has a fairly 
> sophisticated mechanism to decided the expiry times, driven by a bunch 
> of heuristics. As with the minutely rendering, we don't have a periodic 
> update cycle anymore, there is no real good way of setting the expiry 
> times, as one would need to guess when in the future this tile might 
> change. As that is obviously not possible, we need to trade off between 
> caching time (reducing server resources and client side latency) and 
> up-to-dateness to not loose the benefits of the minutely updates.
>
> The heuristics currently supported (and used) are the following.
>
> At a first instance it decides if the tile is known to be "dirty" i.e. 
> outdated. If the tile server is overloaded, or the rendering takes 
> longer than 3 seconds, mod_tile will serve an old tile rather than wait 
> until the on-the-fly rendering will finish. (Again a trade-off between 
> client side latency and up-to-dateness) At that point, given that we 
> know the tile will soon change, the max-age cache parameter is set very 
> low. 15 minutes + a 7 minute random jitter.
>
> If the tile served is not stale, there are another 3 heuristics
> A zoom level based heuristic, a last modified heuristic and a known 
> planet update cycle if it exists.
>
> The zoom level based heuristic allows to set the minimum max-age caching 
> time based on if the tile served is a low zoom, medium zoom or high zoom 
> tile. The idea behind this is that low zoom tiles (even though they are 
> effected by all changes) don't appear to change much. Thus it seems 
> reasonable to allow clients to cache these much longer as the effect of 
> a stale tile from cache is probably less.
>
> The current setup of tile.osm.org, I think, doesn't use this heuristic 
> though and setts the minimum max-age caching to 3 hours + 3 hours random 
> jitter for all zoom levels, even though the minutely tile expiry doesn't 
> actually expire low zoom tiles and thus only change if manually 
> requested. So I think it would be good to increase the time to cache low 
> zoom tiles, as in the current setup it shouldn't affect things 
> negatively.
>
> The last modified heuristic tries to guess how likely it is for a tile 
> to change. E.g. a tile in the middle of the pacific is probably not 
> going to change anytime soon. So it wouldn't matter to give e.g. a 
> max-age of a week. A tile perhaps in central Berlin is more likely to 
> change. So the heuristic guesses how likely it is to change in

Re: [OSM-talk] Tile caching (osm startpage)

[Bernhard zwischenbrugger]

John Smith schrieb:
> On 6 March 2010 01:24, Bernhard zwischenbrugger  wrote:
>   
>> Google Cache Time:
>> Cache-Control: public, max-age=  //feels like one month (I
>> didn't calculate)
>> 
>
> I'd say it's a bad idea to specify a cache time, instead there is
> other caching mechanisms to tell if a tile has changed:
>
>   
>> ETag: "d096ddafba32c0da609007e224530ccd"
>> 
>
> This way if a tile never changes you never need to refresh.
>   
But the browser sends the ETag to the server all the time. The server 
answers "304 not modified".

Phnom Penh load times:
To get the HTTP header of a picture takes here at the moment 1.3 seconds.
To load the picture it's about 2.5 seconds for a single picture.

An image that is already in cache takes about 1.3 seconds to load (must 
wait for 304 header).

This values are measured using "wget" and "HEAD" at commandline.

In browser the load time is even worse.

see: http://wiki.openstreetmap.org/wiki/File:Imageloadtime.png

Bernhard





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[OSM-talk] Tile caching (osm startpage)

[Bernhard zwischenbrugger]

Hi all

I'm sitting in Phom Penh and have very slow internet.
The tiles come in very very slow.

I'm working on a new javascript map...
full story: http://www.mail-archive.com/d...@openstreetmap.org/msg10669.html

The internet is too slow here for developing, so I had to install a 
local image proxy.
Now it's fast as hell. It's faster than at home.

If a tile is changed I will see the old version for a long time.
But it's fast and usable.


HTTP HEAD

Google Cache Time:
Cache-Control: public, max-age=  //feels like one month (I 
didn't calculate)

OSM Cache Time:
eTag (no cache)

- Story

In many countrys (like cambodia) the ping is very long. It can be easily 
some seconds.
osm.org is slow slow slow.
It takes long time until all the tile for the osm startpage are loaded.
But then the problem starts.
Every move I make on the map is s slow.
Even if I was looking at the same spot on the map a couple of days ago.


For visitors of osm.org a good caching is important.
For editors of osm.org it's important to have the newest version of the 
tiles.

For visitors (not logged in) there could be a diffent caching than for 
editors (logged in).

Caching is important if you sit somewhere in a developig country with 
slow internet connection.

Implementation

Tileserver visiter
cache.openstreetmap.org

Tileserver editor
tiles.openstreetmap.org

The Servers should deliver headers for long and short caching time.
The map for logged in users should load images from
tiles.openstreetmap.org.
(extensible rules...)


Never mind, I was just thinking about that and want to distribute it.

Wish you a nice day

Bernhard







--OSM:

HEAD http://a.andy.sandbox.cloudmade.com/tiles/cycle/17/37480/50153.png
200 OK
Cache-Control: max-age=440434
Connection: close
Date: Fri, 05 Mar 2010 14:37:11 GMT
ETag: "d096ddafba32c0da609007e224530ccd"
Server: Apache/2.2.8 (Ubuntu)
Content-Length: 45409
Content-Type: image/png
Expires: Wed, 10 Mar 2010 16:57:46 GMT
Client-Date: Fri, 05 Mar 2010 14:37:11 GMT
Client-Peer: 75.101.147.222:80
Client-Response-Num: 1


-GOOGLE:

HEAD "http://mt1.google.com/vt/lyr...@118&hl=de&x=3&y=6&z=4&s=Galileo";
200 OK
Cache-Control: public, max-age=
Connection: close
Date: Fri, 05 Mar 2010 14:45:02 GMT
Server: maptiles-versatile
Content-Length: 19810
Content-Type: image/png
Client-Date: Fri, 05 Mar 2010 14:45:02 GMT
Client-Peer: 64.233.189.136:80
Client-Response-Num: 1
X-Content-Type-Options: nosniff
X-XSS-Protection: 0


Sorry, I posted something similar bevor:
http://www.mail-archive.com/talk@openstreetmap.org/msg23461.html


Bernhard

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[OSM-talk] Chile Earthquake

[Bernhard zwischenbrugger]

Earthquake 8.8 in Chile close to
http://www.openstreetmap.org/?lat=-35.4333&lon=-71.6667&zoom=13
Tsunami Warning

Any  highres images available?

Bernhard

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Re: [OSM-talk] iPhone vs Android - OSM shootout

[Bernhard zwischenbrugger]

Safari in iPhone is better for maps than Android browser

o no SVG in Android browser
o no multitouch in Android browser Javascript (evt.touches)
o no 3d CSS in Android browser 3d css is good for fast zooming)

bernhard


Valent Turkovic schrieb:
> Hi,
> I'm looking for the best mobile phone for OpenStreetMap. 
> Which mobile phone do you think is better for OpenStreetMap?
>
> Things for consideration are:
> - onboard GPS precision
> - applications for GPS logging
> - applications for POI collection
> - battery life when mapping (how long can you map)
>
> Please share any experience that you have with any or even better if you 
> had experience with both of them. I only user iPhone for a short while, 
> and haven't even seen Android for real but I ran Android emulator via SDK 
> to get a feel for it.
>
>
> Here are some of my thoughts...
>
> Android positive points:
> - platform on the uptake, more apps coming every day
> - nice POI collection app [1]
> - runs multiple apps at once
> - quite open platform
>
> Android negative points:
> - less apps than iPhone, both for OSM and general
> - not so good as multimedia player (video and audio podcasts)
> - a bit bigger and heavier than iPhone
>
>
> iPhone positive points:
> - lots of apps, both for OSM and general [2]
> - CloudMade MapZen POI collector supports for iPhone [3]
> - multitouch interface
> - great multimedia player (video and audio podcasts)
> - nice deal for a 2 year T-Mobile contract
>
> iPhone negative points:
> - runs only one app at once :(
> - pretty closed platform :(
> - quite expensive, no carrier in Croatia offers it in contract deals :(
>
>
> [1] http://maps.bigtincan.com/btc-mapper.php
> [2] http://blog.cloudmade.com/2009/03/19/bring-cloudmade-maps-to-your-
> iphone-application/
> [3] http://mapzen.cloudmade.com/mapzen-poi-collector
>
>
>   


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Re: [OSM-talk] Undo request button for changesets

[Bernhard zwischenbrugger]

hi

I called it an "undo *request* button.
If I see a problem in the changelog I'm not able to revert it.
There is no defined way to report the problem.

The real problem starts if people start to repair manually.

What about a button that opens a dialog where people can describe the 
problem.
The problem description including changeset id could be sent to a 
special (ninja mapper) mailing  list, or to an RSS file, or to some 
special users,...

In some cases the revert could be done without human review.
Example:
o user wants to revert the own edits
o "power user" (mapper since 2 years) reverts changes of new user
o ...

Once the reporting UI is done it can start with manual reverts and can 
be improved doing automatic reverts.

Bernhard


> You are confusing what is technically possible with what is socially 
> acceptable. Frederik's point was that when you are doing a revert you 
> should consider whether (socially speaking) it is appropriate.
>
> So, to use his examples, if somebody mails him saying "I just made a 
> mistake, can you revert my edit" then that is obviously fine; but if 
> somebody on the other side of the world emails him saying "X keeps 
> making bad edits, can you revert them" then he will decline as he has no 
> way of knowing the background to the situation or who is right.
>
>   


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[OSM-talk] Undo request button for changesets

[Bernhard zwischenbrugger]

Hi all

Now we have the changesets like
http://www.openstreetmap.org/browse/changeset/1815935

It's relative easy to identify bad edits.

Is it possible to add an "undo request button" or "spam button" to this 
page?

Bernhard


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Re: [OSM-talk] Painting with maps

[Bernhard zwischenbrugger]

Hi
> "painting with maps" is really cool! Would it be too much to ask for
> "permalinks"? I was just thinking about sending links to my friends...
>   
Just added:

Examples:
http://www.khtml.org/mapart/#Face.xml
http://www.khtml.org/mapart/#alien.xml


Bernhard

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Re: [OSM-talk] Painting with maps

[Bernhard zwischenbrugger]

Hi
>
> but does it save the exact position and zoom? Since it allows nice 
> fine zoom levels.
Now  http://www.khtml.org/mapart/  should be (more) exact.

Bernhard

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[OSM-talk] Painting with maps

[Bernhard zwischenbrugger]

Hi all

I was a bit bored ...

http://www.khtml.org/mapart/

There are 28 slippy maps on a page.
You can  move the maps with mouse and zoom with mousewheel.
If you like what you produced, you can save the result.

Have fun

Bernhard

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[OSM-talk] Flood in Vienna

[Bernhard zwischenbrugger]

We had lots of problems with high water in Austria.

But that's a bug I think:
http://www.khtml.org/index.php?gpsString=16.32175,48.21787,16

Any idea where the blue background comes from in mapnik?

Bernhard

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Re: [OSM-talk] map with FF 3.5 geolocation und hostip

[Bernhard zwischenbrugger]

hi all
> People care because it has been standardized and is being implemented
> by major players: http://dev.w3.org/geo/api/spec-source.html
>   
Firefox, iPhone, Blackberry geolocation is a funny thing.
Easy to use.

But how does it work?
There must be somewhere a big database that stores the GPS locations of 
millions of WIFI access points.

Where can't I find information about that.

I simply don't know if my map
http://www.khtml.org
gives the correct position to the users.

At the 3 places I tested it worked very well.

The error was less than 10m at 2 places, but sometimes it showed the 
city center which is about 1km from here.
At the 3rd place the error was about 100m.

Does geolocation give the correct coordinates at your place?

Bernhard



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[OSM-talk] map with FF 3.5 geolocation und hostip

[Bernhard zwischenbrugger]

Hi all

I tried to find the users position.

First I read the location from http://api.hostip.info.
Then, if the user has a browser with "geolocation" (wifi based position 
finder) the user will be asked if he wants to give his Firefox 3.5 
geolocation to the browser.

The map:
http://www.khtml.org


have fun

Bernhard

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Re: [OSM-talk] history in xml format

[Bernhard zwischenbrugger]

hi
> There's no API that gives you OSM data on a per-changeset basis. You
> can only retrieve osmChange files which are all changes within a given
> timeframe (e.g. minutely, hourly, daily).
>   

Do you mean this:
http://planet.openstreetmap.org/minute/

It's about 5minutes delayed.

The data at
http://www.openstreetmap.org/browse/changesets
are not delayed.
There must be an other source for these data.

Bernhard


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[OSM-talk] history in xml format

[Bernhard zwischenbrugger]

Hi

I was searching the api but couldn't find a call that gives me the data of:

http://www.openstreetmap.org/browse/changesets

How can I get these data?
Is it the normal api or the xapi?


bernhard

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[OSM-talk] Free GPS data logger for developing countries?

[Bernhard zwischenbrugger]

Hi

A posted the SOTM/Scholarships - OpenStreetMap 
 
announcement to my Cambodian friends at facebook but it was already too 
late.

But I got some feedback from students studying Land Management and 
Geomatics.

My question:
Is there a possibility to send free GPS Dataloggers to Cambodia?
Most people in Cambodia are not rich and I'm also not rich.

Is there are program to provide GPS devices to developing countries?

Bernhard

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[OSM-talk] Satellite for OSM

[Bernhard zwischenbrugger]

To lunch a small Satellite is not very expensive.
Are there plans for an OSM satellite?

Here some informations about small satellites
http://www.lr.tudelft.nl/live/pagina.jsp?id=93f0b74b-d401-4d3b-bc93-b46aff8d5ab5&lang=en


Bernhard

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Re: [OSM-talk] Live Data - all new Data in OSM

[Bernhard zwischenbrugger]

Jonathan Bennett schrieb:
> andrzej zaborowski wrote:
>  > Cool visualisation tools don't have to comply with a) or b), they just
>   
>> need to be cool :)
>> 
>
> So cool you're prepared to pay for the infrastructure to support it?
>
>
>   
To put OSM data live to xmpp ist very simple and I don't think it's 
expensive.

An easy way would be to post it to a xmpp groupchat:


geodata here


After login it's just a copy to a tcp socket port 5222.
Everybody who wants the data can log into the groupchat and gets all the 
new data.
Jabber Servers can handle the load without problem (not sure about that 
) and maybe its possible to use an existing jabber server like 
jabber.org, jabber.ru,

I would like to see that. It would be a perfect playground for me.

Bernhard

OSM Live (6 Minutes delay):
http://datenkueche.com/osmlive/






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Re: [OSM-talk] Live Data - all new Data in OSM

[Bernhard zwischenbrugger]

Hi

Maybe you like this:
http://datenkueche.com/osmlive/

If I get nice feedback I will make it zoomable.

Bernhard

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Re: [OSM-talk] Live Data - all new Data in OSM

[Bernhard zwischenbrugger]

Hi
> http://planet.openstreetmap.org/minute/
>
That's perfect!!!

Is there also the a file with the *newest* data?
Or do I have to read the timestamp file?

I don't want to synchronize a database. The thing I'm thinking
about is a visualization of the current activity.

Bernhard

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[OSM-talk] Live Data - all new Data in OSM

[Bernhard zwischenbrugger]

Hi all

Is there a possibility to get all new data entered to OSM in realtime?

If someone adds a new road, building, restaurant,... I would like to 
have this data.

There was talks to put this kind of data to the jabber network.
Is this already available?

Bernhard

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Re: [OSM-talk] My slippy map - call for testing

[Bernhard Zwischenbrugger]

Hi
restricting  
it so that you can only view at specific zoom factors but you can also  
drag the tiles when they're part-way between zooms?
  

Now it snaps to a "good" zoom level.

http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/oomap4/

Bernhard

PS: wheelmouse for safari and chrome does not work. When I get my new 
laptop (maybe tomorrow) I can test that.
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[OSM-talk] My slippy map

[Bernhard Zwischenbrugger]

Hi


yes it's smooth :) but you disabled the useful "shift + clic" for
rapid zooming a zone...


That's implemented now:
http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/oomap4/
(but only tested with firefox 2.0)


I'm not sure he "disabled" it as much as "hasn't got around to  
implementing it". 


I simple didn't know that. That's really useful.


Has to be said though, that's one smooth zoom.


Thanks

I  think the animated zooms could do with being a little faster but  
that's no big deal,


It's perfect on my touchpad. There is also an extra speed boost if you turn the wheel very fast. 
I increased the extra speed a bit - maybe it's ok now.



am I right in thinking that you're not restricting  
it so that you can only view at specific zoom factors but you can also  
drag the tiles when they're part-way between zooms?


That's the big problem.
Google Maps always snaps to a "good" zoom lavel - but I don't like it very much.
I'm searching for a solution - but have no idea how to solve that.
The user expects an excellent picture for all zoom levels, but that's not 
possible with raster images.

thanks for testing

Bernhard



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[OSM-talk] My slippy map - call for testing

[Bernhard Zwischenbrugger]

Hi

Just an other slippy map:
http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/oomap4/index.php

Maybe you like the zoom.

Bernhard

http://datenkueche.com
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Re: [OSM-talk] Edit war on the wiki "map features"

[Bernhard Zwischenbrugger]

Douglas Furlong wrote:
2008/12/2 Bernhard Zwischenbrugger <[EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>>



   pothole_ratio=0.2  #20% of the surface are potholes
   max_pothole_size=50cm


If it is a frequently traveled road by motorised vehicle, that
size will not be very static.

That depends on the country!!


Only if the term "frequently" varies per country, other wise I'd 
expect the surface to deteriorate pretty much in the same way.


And as it's subjective, one could argue that it doesn't depend on the 
country at all, but the person thinking about it.


Any way, the point is, pot holes on roads that are frequently/heavily 
used WILL vary quite quickly, and I'm not sure it some thing we'd be 
looking to have as a static land mark.



If you ride on a Royal Enfield in India, information about potholes is 
probably the most important thing you need.

It's an information you don't find on other maps.

In the North America, Europe, China, Thailand,... there are good roads 
but most of the countries still have horrible roads.


Bernhard
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Re: [OSM-talk] Edit war on the wiki "map features"

[Bernhard Zwischenbrugger]

pothole_ratio=0.2  #20% of the surface are potholes
max_pothole_size=50cm


If it is a frequently traveled road by motorised vehicle, that size 
will not be very static.



That depends on the country!!

Bernhard
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Re: [OSM-talk] Edit war on the wiki "map features"

[Bernhard Zwischenbrugger]

hi

smoothness 

I found a wiki page - but it's in German:
http://de.wikipedia.org/wiki/Zustandserfassung_und_-bewertung

They have a scale from 1 to 5 for "zustandswert":

1.5 : maximum for new roads
3.5 : warning level
4.5 : /"Schwellenwert" - the road must be repaired

/For measuring there is a mashine called "planograph":
http://de.wikipedia.org/wiki/Planograph

Here a pdf with nice pictures:
http://squadra.net/downloads/Workshop_messtechnische%20Erfassung.pdf

maybe there are similar infos in english - but I couldn't find.


Bernhard
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Re: [OSM-talk] Edit war on the wiki "map features"

[Bernhard Zwischenbrugger]

Hi


bicycle=no|yes|difficult|unsuitable

so you'd get

highway=bridleway
foot=yes (permitted, no problem)
bicycle:racer=unsuitable (permitted but not practical)
bicycle:hybrid=difficult (permitted but challenging)
bicycle:mtb=yes (permitted, no problem)


In Vienna we have an event called "Friday Night Skating".
Every week about 1000 Inline Skater meet at 10pm and skate on normal roads.
The police blocks all the roads an it is possible to skate on roads that 
are for normal for cars only.


The route is about 15 to 25 km.

To plan an event like this is not easy.
It should be a different route every week.
If it's combined with sightseeing it's optimal.

There are similar events in many cities like Paris, Munich,... sometimes 
with much more skaters.


For beginners the road surface is very important.

It should be possible to plan a Friday Night Skate route with data from OSM.

If we have a tag
skate:xy
bicycle:xy
people think it's allowed to go by bike or inline skates on this roads - 
but it isn't.


For more info:
http://de.wikipedia.org/wiki/Skatenight
http://www.nightskating.at
http://www.muenchner-blade-night.de/

Sorry - all in German


Bernhard

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[OSM-talk] Coordinate in wiki page

[Bernhard Zwischenbrugger]

Hi

I tried this:

{{Coordinate|article=/|NS=48.054048|EW=14.705797|type=city|region=AT-03}}

But ist does not work.

How to make a link to the map? Hardcoded?


Bernhard

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Re: [OSM-talk] Proposal for a map-bug tracker (Openstreetbugs)

[Bernhard Zwischenbrugger]

Hi

What about defining the API first?
And before defining the API we need the use cases.

An other thing I would like to see are bug reports in XMPP (Jabber) Network.
Think about a map that shows you a new report without polling.
People could discuss immediately in a small chat window about this bug.
Scalability shouldn't be a problem with XMPP.


Bernhard


Tom Hughes wrote:

Matt Amos wrote:
  

On Sat, Nov 29, 2008 at 12:45 AM, Frederik Ramm <[EMAIL PROTECTED]> wrote:


(I believe the notes API may suffer - my interpretation - from the idea
of putting comments directly into the OSM database rather than into a
separate data set where they - my opinion - belong but it's worth
checking anyway.)
  

i totally agree - OSB has managed just fine as a separate database.



The problem with the notesapi branch is not that it's the same database 
but just that it takes the wrong approach to doing things within that 
database.


For the record my preference would very much be for this to be a rails 
based system within the current database.


Tom

  


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Re: [OSM-talk] Google Maps - OSM comparison

[Bernhard Zwischenbrugger]

Hi

When I did this capital comparison I searched for

o A relation that contains all capitals (didn't find)
o Then I wanted to use osmxapi - but that was down
o Then I tried to search for microformats for geolocations in Wikipedia 
but there are only a few cities with microformats
o namefinder in combination with a wiki page was by far the best 
solution (http://en.wikipedia.org/wiki/List_of_national_capitals)


I'm really happy with the result we have now.

o We realized that somebody has stolen London
o Many capitals are not in the map jet - people can improve osm
o For the namefinder sorting the result can be a challenge

I made a new page with

o not found capitals
o update button

http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/capitals/status.php

If there is a better solution to find capitals and WGS84 points let me know.



Bernhard
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Re: [OSM-talk] Google Maps - OSM comparison

[Bernhard Zwischenbrugger]

hi

and New Delhi is not shown at all

  

There were some bugs with spaces, commas,... (urlencode)
They are fixed now.

There are still some problems.

The capitals come from this list
http://en.wikipedia.org/wiki/List_of_national_capitals

The name of the city is given to namefinder.
The first item namefinder returns is displayed on the map.

At the moment there are problems with:

Paris - wrong Paris found
London - missing (found an other London)
Washington, D.C. - not found
Honiara - not found
Kuwait City - not found
Melekeok (Palau) - not found
Mexico City - not exact
N'Djamena (Chad) - found in france
Palikir (Mikronesia) - not found
Phnom Penh (Cambodia) - not found
Naypyidaw (Myanmar) - not found
South Tarawa (Kiribati) - not found
Sri Jayawardenepura( Sri Lanke) - not found
Ulaanbaatar (Mongolia) - not found
Yaren (Nauru) -not found

-

Captials in Europe are done very well (Vaduz is an exception)

In South America OSM is far behind Google

In Afrika the winner is OSM

In Asia it's mixed.

http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/capitals/

Bernhard

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[OSM-talk] Google Maps - OSM comparison

[Bernhard Zwischenbrugger]

Hi all

I made a comparison Google Maps - OSM for all capitals.
http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/capitals/index.php

Some cities like Havanna have wrong coordinates. No idea why the 
namefinder thinks that Havanna in the USA is more important, than 
Havanna in Cuba.



---

Bernhard


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[OSM-talk] Google maps compatible javascript api legal?

[Bernhard Zwischenbrugger]

Hi all

I was playing a bit with javascript and the osm images:
http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/oomap/

The api I made has the same syntax as google maps api.
Is it legal to rebuild the Google API?

Bernhard

PS:
I know there is openlayer and it's also possible to use the original 
Google API

with osm images


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Re: [OSM-talk] OSM relation to kml

[Bernhard Zwischenbrugger]

Hi

Thanks a lot!!!

http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/osmkml/map.php
is much faster now.

Bernhard


Frederik Ramm wrote:

Hi,

Bernhard Zwischenbrugger wrote:
It's s slow. At the moment I have to make a http connection for 
every way and every node of every way.


Is there a way to speed that up?


GET /api/0.5/relation/1234/full

gives you all ways and nodes. Other than that, make sure you use HTTP 
keepalive, and if PHP cannot do that then install a proxy in between 
that does.


Bye
Frederik



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[OSM-talk] OSM relation to kml

[Bernhard Zwischenbrugger]

Hi all

I made a OSM-Relation to kml converter:
http://lamp2.fhstp.ac.at/~lbz/beispiele/ws2008/osmkml/map.php

It's s slow. At the moment I have to make a http connection for 
every way and every node of every way.


Is there a way to speed that up?

Bernhard
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[OSM-talk] osmxapi - stability

[Bernhard Zwischenbrugger]

Hi all

It looks like osmxapi is down on all servers.
Will it be available today or tomorrow again?

I want to show it tomorrow to my students.
They will make a project using the osmxapi.

thanks

Bernhard
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	Add new words as easy as in an Excel Table.
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version:2.1
end:vcard

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