Re: [Talk-GB] Bristol - a quick (and surprising?) statistic...

2010-08-08 Thread Ed Avis
Dave F. dave...@... writes:

Personally I'd take OS as evidence of the existence of a road as
well.

Yes.  A name is a social construct, not a physical thing that can be measured
on the ground, so if it appears in the Ordnance Survey map - which is pretty 
much
the definitive(*) map in this country - then it can be said to exist.  Unless
there is evidence to the contrary such as a street sign saying something
different.

(*) definitive, serving to define or specify precisely (M-W)

-- 
Ed Avis e...@waniasset.com


___
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb


Re: [Talk-GB] Motorway junction naming

2010-08-08 Thread Dave F.

 On 06/08/2010 15:49, Andy Sinclair wrote:

Hello.

I notice that a number of motorway junctions near me have been tagged 
with rather large names.


For example, the name tag for M4 J16, normally referred to locally as 
Swindon West is:


 A3102 Swindon West, Wootton Bassett, RAF Lyneham, Calne

Should this be simplified in some way?


Andy

OS Streetview has names labelled for junction 16 (Spittleborough 
Roundabout)  18 (Tormarton interchange).


Obviously it the signs on the ground show differences they should take 
preference.


Cheers
Dave F.

___
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb


Re: [Talk-GB] Bristol - a quick (and surprising?) statistic...

2010-08-08 Thread Dave F.

 On 08/08/2010 14:01, Craig Wallace wrote:

On 03/01/2006 00:37, Dave F. wrote:

  On 07/08/2010 19:34, Richard Moss wrote:


I take data from OS as evidence that there is a name for a 
road/track etc.


I'm happy with that where I know a road exists, and I have added names
to the farm tracks around the village.  But putting roads on OSM
without actually verifying that they exists, that's another debate :)


Personally I'd take OS as evidence of the existence of a road as well.
Obviously it would be good to have travelled it as OSL isn't the most
accurate for location  direction, but at least we know it's there.

It was concluded in a previous discussion that OS didn't put 'easter
eggs' into their data.

Do you have any examples of roads not being on the ground?


Correction: When I said OSL above, I meant OSSV



A 'road' of some sort yes. But the OS Streetview maps sometimes aren't 
clear whether its an unclassified road, a residential road, a driveway 
or farm track or a path etc. Plus a few roads which are still under 
construction.


True, on ground verification is often needed, but it's still evidence 
that it exists.




Anyway, isn't this thread is about names from OS Locator, not names 
from OS Streetview.


Well, not really, it was about adding roads to the map for which OSSV is 
being used. OSL was used as a statistical tool.
I see the OS data release as one set of data from one source  all 
manifestations of it (OSL OSSV) should be used in conjunction with each 
other.






PS: your clock is rather wrong.


Thanks. I had a BIOS battery failure  for some reason it's not finding 
a 'RPC server' to auto update it.


Cheers
Dave F.


___
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb


Re: [Talk-GB] Yet more musical chairs updates.

2010-08-08 Thread Dave F.

 On 05/08/2010 23:05, Robert Scott wrote:

On Wednesday 04 August 2010, Dave F. wrote:

Would it be possible to turn these circles off at lower zoom levels?
Personally I like to double click on the map to zoom in at these levels
as it centres the city I'm interested in  so I can  then use the bar to
zoom accurately to the specific area I'm interested in.

Success. I've monkeypatched OpenLayers so SelectFeature doesn't swallow 
dblclick events.


It's an improvement, but it tries to refresh on every click slowing it 
down a lot. I still think it would be better to turn it off until at 
least zoom 13 or even higher.


You can't accurately check data until about zoom 16 anyway.

cheers
Dave F.



___
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb


Re: [Talk-GB] Yet more musical chairs updates.

2010-08-08 Thread Dave F.

 On 08/08/2010 19:48, Robert Scott wrote:

On Sunday 08 August 2010, Dave F. wrote:

It's an improvement, but it tries to refresh on every click

By refresh do you mean it tries to load the selected match details?


It redraws all the different colour circles on the map (supposedly 
searching the database each time)  list specific data on the right for 
the circle that was under the double click - pointless if you just want 
to zoom in.



You can't accurately check data until about zoom 16 anyway.

On the contrary. I often look at the recent changes view fully zoomed out (thus seeing 
all changes from the last couple of days), select an entry I find curious and hit the (new) 
Zoom to button to check it out.


Yeah, but you're looking at it from the perspective of the person who's 
programmed it  knows it's every nuance.
Try looking at it from the point of view of the newbies - they'll want 
to zoom in to their local town, where they'll understand what they're 
looking at before deciphering all the options.


The titles you use don't offer clarity for them. Musical Chairs, as a 
prime example, gives no indication of what the program does.


Instead of a simple Help you've got What?  even Algorithm - who, of 
those that want to *use* your web page need to know how it was 
programmed? If somebody really does, they can email you.


Under What? you give half the information required. Instead of 
explaining the differences in colours you just say It is coloured 
according to whether it has a similarly named and placed counterpart in 
OSM and how good the agreement is between them. Not specifically 
helpful. What does blue represent?


What use is random sample?

How  recent is recent status?

Why does it start at a zoom level that includes half of Northern Europe?

This is a half decent utility, to needs some teaks to make it user friendly.

Cheers
Dave F.

___
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb


Re: [Talk-GB] Yet more musical chairs updates.

2010-08-08 Thread Robert Scott
On Sunday 08 August 2010, Dave F. wrote:
 It redraws all the different colour circles on the map (supposedly 
 searching the database each time)  list specific data on the right for 
 the circle that was under the double click - pointless if you just want 
 to zoom in.

Oh!

Yes - this is intended, and what's more it's vital that it keeps refreshing the 
view. When showing a non-authoritative view, the results it shows is highly 
dependent on the view's bounding box. It shows the first 1024 results. 
Obviously, it will show the first 1024 results in the area you're looking at. 
As you zoom in, it will adaptively (every two zoomlevels) increase the level of 
detail. This is necessary to keep showing the user a relevant amount of detail.

You can't have people zooming all the way in to milton keynes and it still only 
show you the one little circle that was visible at the country level. Or do you 
expect people to have to manually click refresh every time they want more 
results? How would they discover that? More textual instructions? There's 
limited space on the panel.

The non-authoritative views are only meant as a rough overview before you get 
zoomed in enough.

 Yeah, but you're looking at it from the perspective of the person who's 
 programmed it  knows it's every nuance.

I'm looking at it from the view of a power user.

 Try looking at it from the point of view of the newbies - they'll want 
 to zoom in to their local town, where they'll understand what they're 
 looking at before deciphering all the options.
 
 The titles you use don't offer clarity for them. Musical Chairs, as a 
 prime example, gives no indication of what the program does.

No, I didn't consult a focus group before I slapped that name infront of it if 
that's what you're asking.

 Instead of a simple Help you've got What?  even Algorithm - who, of 
 those that want to *use* your web page need to know how it was 
 programmed? If somebody really does, they can email you.

It was written back when this stuff really was just an algorithm and I found a 
couple of free hours to write up an explanation. It's the only page I had on it 
- so I included a link to it.

 Under What? you give half the information required. Instead of 
 explaining the differences in colours you just say It is coloured 
 according to whether it has a similarly named and placed counterpart in 
 OSM and how good the agreement is between them. Not specifically 
 helpful.

It's also out of date.

That's the problem with writing help etc. It goes out of date as soon as you 
change things. Every time you add more help/documentation, you increase the 
burden of keeping it up to date.

The trick is to _try_ and make it all as obvious and discoverable as possible. 
That was my idea with the little hoverable question mark.

 Why does it start at a zoom level that includes half of Northern Europe?

Because when you tell openlayers to show a view including a certain bbox (GB) 
it picks the highest zoomlevel it can that will show the whole thing. You'll 
find that the next zoomlevel up will cut off part of GB.

 This is a half decent utility, to needs some teaks to make it user friendly.

You are expecting too much from me. This is something I've hacked together in 
odd spare hours and half hours I've found now and then. Writing decent help 
would be great. But I primarily see this as a power user's tool that people who 
fix a lot of things can use to... er... fix a lot of things. If someone wants 
to do a whole UI survey on it, that would be lovely.

Unfortunately this is how a lot of OSM software spends its life. Looked at JOSM 
lately?


robert.

ps- Patches are welcome.

___
Talk-GB mailing list
Talk-GB@openstreetmap.org
http://lists.openstreetmap.org/listinfo/talk-gb