[talk-au] Mapnik rendering

2011-09-01 Thread John Henderson

highway=ford is not rendering on Mapnik, eg:

http://www.openstreetmap.org/?lat=-35.50894lon=149.67154zoom=17layers=M

I believe it should.  I have no idea who to raise this issue with, or how.

Before I spend more time looking, does somebody happen to know?

John H

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Re: [talk-au] Missing streets in Sydney

2011-09-01 Thread Ian Sergeant
On 30 August 2011 16:41, Steve Bennett stevag...@gmail.com wrote:


 1) Roads without names are almost as valuable as roads with names for
 certain uses. (Eg, choosing a route to save to a GPS works just as
 well without names)


One way streets?  Roads with barriers at the end of them?  Roads with no
entry signs?  Cross country roads that are private and gated?  Through roads
mapped as service roads, and v.v?

2) There are strong arguments that there is no copyright in street
 names. If that argument is ever developed, we could easily fill in all
 the street names from other sources without doing the ground
 surveying.


The amount of incorrect names, roads, etc in other maps sources verges on
the absurd.  In my local area I could point to tens of examples of streets
on other maps sources with the wrong names.  I'd like to think the survey
and consequent accuracy is an integral part of OSM.

And seriously, if we OSM ended up being traces with imported street names?
I shudder to think..


 Surveying
 suburban streets by GPS these days makes about as much sense as using
 a horse and cart on a freeway...


This tracing vs survey argument is as old as OSM is.  My vision of OSM is to
get take a different route on the bike, or see more of a town when you are
passing through, or even go for a walk around streets in your local area,
rather than being a mechanical turk in front of a computer screen, but each
to their own.  Sometimes there is no alternative to tracing, but I think
tracing without actually ever having placed a foot on the ground in the
area, leads to a significantly poorer quality map, and you don't need to
delve to far into the database for evidence of that..

Ian.
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Re: [talk-au] Mapnik rendering

2011-09-01 Thread John Henderson

On 02/09/11 10:16, Ian Sergeant wrote:

Hi,

I'm pretty sure mapnik doesn't render highway=ford on a way.  It is
probably for the best that it doesn't, IMO.

See

http://forum.openstreetmap.org/viewtopic.php?pid=7510#p7510 and
http://wiki.openstreetmap.org/wiki/Stylesheet for information on what is
included in the stylesheets.

And

http://trac.openstreetmap.org/ticket/2944

for a trac item about rendering fords.

And the wiki for the discussion on tagging fords at the expense of the
type of the underlying highway.


Thanks for that info.  I'm still puzzled as to what you mean by tagging 
fords at the expense of the type of the underlying highway.  I actually 
hope I'm not missing something obvious.


I did have that way tagged as highway=unclassified and ford=yes, but the 
OSM wiki wording suggests that's for places which just might get wet. 
The ford I'm concerned with is long, is the river bed of the Shoalhaven 
River, and is always submerged.  So the wiki is adamant it's highway=ford.


Have I missed some alternative way of having OSM show that the road at 
the river is a through road, and doesn't just stop at either side?


John H

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Re: [talk-au] Mapnik rendering

2011-09-01 Thread Ian Sergeant
Hi,

I'm pretty sure mapnik doesn't render highway=ford on a way.  It is probably
for the best that it doesn't, IMO.

See

http://forum.openstreetmap.org/viewtopic.php?pid=7510#p7510 and
http://wiki.openstreetmap.org/wiki/Stylesheet for information on what is
included in the stylesheets.

And

http://trac.openstreetmap.org/ticket/2944

for a trac item about rendering fords.

And the wiki for the discussion on tagging fords at the expense of the type
of the underlying highway.

Ian.

On 2 September 2011 08:10, John Henderson snow...@gmx.com wrote:

 highway=ford is not rendering on Mapnik, eg:

 http://www.openstreetmap.org/?**lat=-35.50894lon=149.67154**
 zoom=17layers=Mhttp://www.openstreetmap.org/?lat=-35.50894lon=149.67154zoom=17layers=M

 I believe it should.  I have no idea who to raise this issue with, or how.

 Before I spend more time looking, does somebody happen to know?

 John H

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 Talk-au@openstreetmap.org
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Re: [talk-au] Missing streets in Sydney

2011-09-01 Thread Anthony
On Thu, Sep 1, 2011 at 8:40 PM, Ian Sergeant inas66+...@gmail.com wrote:
 On 30 August 2011 16:41, Steve Bennett stevag...@gmail.com wrote:
 Surveying
 suburban streets by GPS these days makes about as much sense as using
 a horse and cart on a freeway...

 This tracing vs survey argument is as old as OSM is.  My vision of OSM is to
 get take a different route on the bike, or see more of a town when you are
 passing through, or even go for a walk around streets in your local area,
 rather than being a mechanical turk in front of a computer screen, but each
 to their own.

Personally I very much agree with this.  I'd never spend my time
tracing the roads of some boring suburb that I have no personal ties
to.  But I'm very glad that not everyone feels this way.

 Sometimes there is no alternative to tracing, but I think
 tracing without actually ever having placed a foot on the ground in the
 area, leads to a significantly poorer quality map, and you don't need to
 delve to far into the database for evidence of that..

Obviously a map is potentially better if one adds foot-on-the-ground
surveying to whatever other methods you are using.  But that's about
all one can say.

Tracing is quite often more accurate and/or precise than using a GPS.
If high res imagery is available, and it appears to be well aligned,
I'm pretty much always going to use that rather than GPS tracks, even
if I have done a foot-on-the-ground survey.

Put another way, unless your survey equipment is something equivalent
to a google car (http://www.flickr.com/photos/stewb2008/5840727837/)
or google bike 
(http://searchengineland.com/google-woos-brits-with-bike-based-street-view-project-19519),
foot/tire-on-the-ground surveying without using high res imagery also
invariably leads to a significantly poorer quality map.

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Re: [talk-au] Mapnik rendering

2011-09-01 Thread Mark Pulley

Quoting John Henderson snow...@gmx.com:


highway=ford is not rendering on Mapnik, eg:

http://www.openstreetmap.org/?lat=-35.50894lon=149.67154zoom=17layers=M

I believe it should.  I have no idea who to raise this issue with, or how.

Before I spend more time looking, does somebody happen to know?

John H


I've been using highway=* ford=yes. On my trip to SA a few months ago,  
I added a few fords to major roads in rural areas (usually dry).


Mark P.



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Re: [talk-au] Mapnik rendering

2011-09-01 Thread Ian Sergeant
On 2 September 2011 11:26, John Henderson snow...@gmx.com wrote:

 On 02/09/11 10:16, Ian Sergeant wrote:

 Hi,

 I'm pretty sure mapnik doesn't render highway=ford on a way.  It is
 probably for the best that it doesn't, IMO.

 See

 http://forum.openstreetmap.**org/viewtopic.php?pid=7510#**p7510http://forum.openstreetmap.org/viewtopic.php?pid=7510#p7510and
 http://wiki.openstreetmap.org/**wiki/Stylesheethttp://wiki.openstreetmap.org/wiki/Stylesheetfor
  information on what is
 included in the stylesheets.

 And

 http://trac.openstreetmap.org/**ticket/2944http://trac.openstreetmap.org/ticket/2944

 for a trac item about rendering fords.

 And the wiki for the discussion on tagging fords at the expense of the
 type of the underlying highway.


 Thanks for that info.  I'm still puzzled as to what you mean by tagging
 fords at the expense of the type of the underlying highway.  I actually
 hope I'm not missing something obvious.

 I did have that way tagged as highway=unclassified and ford=yes, but the
 OSM wiki wording suggests that's for places which just might get wet. The
 ford I'm concerned with is long, is the river bed of the Shoalhaven River,
 and is always submerged.  So the wiki is adamant it's highway=ford.

 Have I missed some alternative way of having OSM show that the road at the
 river is a through road, and doesn't just stop at either side?


See http://wiki.openstreetmap.org/wiki/Key:ford for the discussion I'm
referring to.

Of course you can follow having highway=ford, and highway=unclassified
ford=yes to mean different things, but in my opinion that is
counter-intuitive.

So, if I were you, I would either use highway=ford on a node, rather than a
way, or use highway=unclassified, ford=yes.

Any any event, the mapnik layer isn't (by intention) currently going to
render highway=ford on a way.

Ian.
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Re: [talk-au] Mapnik rendering

2011-09-01 Thread John Henderson

On 02/09/11 12:44, Ian Sergeant wrote:


So, if I were you, I would either use highway=ford on a node, rather
than a way, or use highway=unclassified, ford=yes.


Thanks.  I'll put it back to that again.

John H

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