Re: [OSM-talk] Missing Background Layers

[tony wroblewski]

Silly question, why would you trace from Mapnik, since it's OSM anyway?

On 8 January 2016 at 23:13, Steve Doerr  wrote:
> When editing in Potlatch 2, the list of background layers seems rather
> short. In particular, Mapnik (the default style) is not on the list.
>
> Bug? Or change of policy?
>
> --
> Steve
>
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Re: [OSM-talk] Why newbies' comment/message response rate is so low?

[tony wroblewski]

From experience, I know that such responses are intimidating and put
people off mapping. My girlfriend started mapping some areas when I
showed her how to do it and immediately somebody sent her an email
saying how she should be doing things because he doesn't map it that
way (Neither way was official or written down anyway), and in the end
she said she didn't like it and felt intimidated and decided not to
carry on.

I think people need a playpen where they can try out ideas and map
before contributing to the main map (Maybe there already is, I don't
know). I think it should also be a requirement that people add a
comment upon every commit to avoid such arguments. I'm getting a
little tired of seeing constant updates in my area from people who
don't add comments on why or what they've changed.

Tony


On 14 November 2015 at 18:04, Michał Brzozowski  wrote:
> On Sat, Nov 14, 2015 at 5:19 PM, Gerd Petermann
>  wrote:
>> I think that's quite okay presuming that many users don't speak english
> I forgot to mention. My operations with respect to newcomers are
> almost solely in Poland. So I write in Polish.
>
>> and another group simply doesn't like to be watched / corrected
> I thought this is what community is about? Reviewing others' work? ;-)
> The things I write about are rather obvious mistakes, like: no main
> POI tag (amenity, shop, ...), free text in opening_hours, geometry
> errors and so on.
>
> Recently I found out that simple "please fix" or "please respond" (if
> edits need clarification) boosts chances for a reply or fixing by the
> user. How about we make some tips/guidelines for communications with
> newcomers on the Wiki? People could share practices they find most
> effective.
>
> Michał
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Re: [Talk-GB] Environment Agency LIDAR datasets OGL licensed now available

[tony wroblewski]

Hi Chris

Would it be possible to somehow use this data with the building
outlines from OS OpenMap?. I know that data is somewhat
simplified/generalised, but maybe combined together we could get an
idea of how the simplified shapes from OS OpenData are terraced and
even get their heights. I'm not talking about an import, but an
imagery layer with both combined somehow.

I've used OS and OSM data combined to produce free scenery for flight
simulators http://world2xplane.com/2015/03/30/gb-pro-scenery/. (I've
used OpenStreetMap for other countries for great effect, but the UK
data lacks detail). Despite the simplified data, I've used various
simple algorithms and rules to try and terrace the buildings
automatically (It doesn't need to be 100% accurate for the
flight-sim), and the results have given realistic looking UK towns and
cities. For my next version of the scenery, I'm going to use this data
to also get the correct building heights (my subtracting the height
from the land mesh underneath). Perhaps this effort could be useful
for OSM in some way.

Regards

Tony


On 25 September 2015 at 23:03, Chris Hill  wrote:
> I've had a go at extracting the height of buildings from the Environment
> Agency LIDAR, and it seems possible.
>
> I loaded the EA data into a database and found all the height points within
> the polygon of an existing building outline. The highest value is the height
> of the building. From that I could (haven't yet) create a file of changes to
> add the height to each building. One thing that causes a problem is a tree
> near a house as it can create a higher point than the house.
>
> Using this would be an import and would need to go through the import
> declaration process IMO. I have also thought about creating an editor
> overlay to show the heights so they can be added manually. It's more work
> and I think it's still really an import, but checking each height as it gets
> added should spot anomalies.
>
> I'm going to tidy up the process and write it up in detail as a blog post
> over the next few days so anyone else can try it out too.
>
> --
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> user: chillly
>
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Re: [OSM-talk] OpenStreetMap Carto v2.33.0 release

[tony wroblewski]

The woodland change looks much better, but would it not be possible to
render broadleaved, needleleaved and mixed using different tree
images, as seen on other maps? This would, I think, give people more
incentive to add this information when mapping woodland.

Regards

Tony


On 15 August 2015 at 04:27, Paul Norman penor...@mac.com wrote:
 This email is also in user diary form at osm.org/user/pnorman/diary/35589
 where issue numbers are linked.

 OpenStreetMap Carto 2.33.0 has been released. This release focuses on
 cartographic style improvements, but the release notes also include 2.32.0.

 The biggest changes are

 - A randomized symbology for forests for natural=wood and landuse=forest
   #1728 #1242

   A long time in the works, this improvement has finally landed. The two
   tags were merged - they are indistinguishable to the data consumer.[1]
   A randomized symbology was first suggested by SK53[2] at SOTM-EU 2014,
   and this feature would not have happened without his extensive research,
   or imagico's tools for creating an irregular but uniformly distributed
   and periodic dot pattern[3]

 - Rendering minor roads and service rail later for mid-zoom clarity
   #1682 #1692 #1676 #1647

   As all residential, unclassified, and service roads in a city became
   mapped the rendered view became over-crowded, bloblike, and difficult
   to read.

 - Unification of footway/path and rendering surface of them

   The mess that is highway=path is well-known[4], and it is necessary
   to do some kind of processing as a data consumer. A distinction is
   now made between paved and unpaved footways.

 - Rendering of Antartic ice sheets from shapefiles #1540

   Ice sheets in Antartica are a bit of a special case, and pre-generated
   shapefiles are now used

 - Mapnik 3 preperations #1579

   The style is not yet fullly tested with Mapnik 3 and we don't claim to
   support it, but several bugs were fixed. Most of the work was done on
   the Mapnik side

 - No longer rendering proposed roads #1663 #1654

 - Power area colour adjusted #1680

 - Better place label order #1689

 - meadow/grassland and orchard/vineyard color unification #1655

 - Render educational area borders later #1662

 - New POI icons

 A full list of changes can be found on Github at
 https://github.com/gravitystorm/openstreetmap-carto/compare/v2.31.0...v2.33.0)

 [1]:
 https://github.com/gravitystorm/openstreetmap-carto/issues/647#issuecomment-52816195
 [2]: http://sk53-osm.blogspot.ca/2014/09/woodland-cartography.html
 [3]: http://www.imagico.de/map/jsdotpattern.php
 [4]: http://www.openstreetmap.org/user/Richard/diary/20333

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Re: [OSM-talk] Looking for well mapped rural area and well mapped town/city

[tony wroblewski]

I can recommend most of East Yorkshire in the UK
http://www.openstreetmap.org/#map=13/53.8689/-0.6582. It's very well
mapped, most fields are traced, landuse, buildings, etc..

Tony


On 22 July 2015 at 10:30, Simone Cortesi sim...@cortesi.com wrote:

 On Mon, Jul 20, 2015 at 12:04 PM, Mateusz Konieczny matkoni...@gmail.com
 wrote:

 I am looking for well mapped rural area. I located some places but all
 are either missing major features (like part of landuse) or quality of
 mapping (especially landuses) is poor.

 I am interested in places mapped better than my current test locations


 maybe relevant: http://bestofosm.org/

 --
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Re: [Talk-GB] New OS open data now available

[tony wroblewski]

Hi All

Just had a quick look at the OpenData, in summary:

- Buildings are slightly more detailed, basically vector versions of
the one on the streetview raster map
- All of the rest, forests, rivers, are no different than the current
Vector data we already have (AFAIK). Forests,rivers etc are the same
size as the older data.
- Roads seem to include a few more details, but not enough detail on
them for accurate usage in OSM.

So basically, it gives us slightly improved buildings, but they are
still highly simplified in terms of their pay for products.

Tony


On 24 March 2015 at 18:58, Rob Nickerson rob.j.nicker...@gmail.com wrote:
 Hi all,

 So the new OS OpenData that was discussed a few weeks ago is now available:

 https://www.ordnancesurvey.co.uk/blog/2015/03/new-os-opendata-products-now-live/

 I think there could be many good uses of this including to help validate
 some of our data.

 If anyone is using this then let us know so that we don't duplicate work.

 Rob


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Re: [Talk-GB] New OS open data now available

[tony wroblewski]

I've just checked the buildings shape file, and every single entry has
the same feature code unfortunately, the same with woodland.

There is however a functional site shape file which gives outlines of
where some key buildings are, along with their names, e.g. Schools,
Hospitals. So this will be useful.

In the download I did (OpenMap), the waterways weren't connected, but
there is a separate download of water features which might be better
quality. I'll give it a try shortly and see if it's any better.

Tony



On 24 March 2015 at 19:34, Rob Nickerson rob.j.nicker...@gmail.com wrote:
 My understanding was that the river dataset is now fully connected (and
 wasn't before). Is this not the case?

 Are there any attributes on the building vector data?

 Rob

 On 24 Mar 2015 18:28, tony wroblewski tony.wroblew...@gmail.com wrote:

 Hi All

 Just had a quick look at the OpenData, in summary:

 - Buildings are slightly more detailed, basically vector versions of
 the one on the streetview raster map
 - All of the rest, forests, rivers, are no different than the current
 Vector data we already have (AFAIK). Forests,rivers etc are the same
 size as the older data.
 - Roads seem to include a few more details, but not enough detail on
 them for accurate usage in OSM.

 So basically, it gives us slightly improved buildings, but they are
 still highly simplified in terms of their pay for products.

 Tony


 On 24 March 2015 at 18:58, Rob Nickerson rob.j.nicker...@gmail.com
 wrote:
  Hi all,
 
  So the new OS OpenData that was discussed a few weeks ago is now
  available:
 
 
  https://www.ordnancesurvey.co.uk/blog/2015/03/new-os-opendata-products-now-live/
 
  I think there could be many good uses of this including to help validate
  some of our data.
 
  If anyone is using this then let us know so that we don't duplicate
  work.
 
  Rob
 
 
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Re: [Talk-GB] New OS open data now available

[tony wroblewski]

Hi All

The river network download is country wide, and does include
connecting node information, along with the names. The data is much
better quality and more accurate than some of the older imported stuff
in OSM. It only includes major rivers and streams and is simplified,
it does not include drains, etc..

The road download is also country wide, it includes connecting node
information and also the names of the roads. It also seems to include
residential roads.

Tony


On 24 March 2015 at 19:34, Rob Nickerson rob.j.nicker...@gmail.com wrote:
 My understanding was that the river dataset is now fully connected (and
 wasn't before). Is this not the case?

 Are there any attributes on the building vector data?

 Rob

 On 24 Mar 2015 18:28, tony wroblewski tony.wroblew...@gmail.com wrote:

 Hi All

 Just had a quick look at the OpenData, in summary:

 - Buildings are slightly more detailed, basically vector versions of
 the one on the streetview raster map
 - All of the rest, forests, rivers, are no different than the current
 Vector data we already have (AFAIK). Forests,rivers etc are the same
 size as the older data.
 - Roads seem to include a few more details, but not enough detail on
 them for accurate usage in OSM.

 So basically, it gives us slightly improved buildings, but they are
 still highly simplified in terms of their pay for products.

 Tony


 On 24 March 2015 at 18:58, Rob Nickerson rob.j.nicker...@gmail.com
 wrote:
  Hi all,
 
  So the new OS OpenData that was discussed a few weeks ago is now
  available:
 
 
  https://www.ordnancesurvey.co.uk/blog/2015/03/new-os-opendata-products-now-live/
 
  I think there could be many good uses of this including to help validate
  some of our data.
 
  If anyone is using this then let us know so that we don't duplicate
  work.
 
  Rob
 
 
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Re: [Talk-GB] Road Names Quarterly Project

[tony wroblewski]

I've seen numerous examples of this in OS OpenData, including fields
marked up as woodland (which aren't on their paid paper maps), also
they move things out of the way, e.g. buildings and drains to make way
for the roads. Also, if anyone has used the OS VectorData to any
extent, they'll notice it's also been altered (simplified)
unnecessarily, or random things have been omitted for no apparent
reason, e.g. large ponds, whilst the small ones are included. It
almost seems to me that the OpenData is purposely created this way to
limit its usefulness (e.g. No vector version of StreetView, missing
tracks (but they include historical roman roads??), so they've done
the absolute minimum to make their data open.

Compared with other countries who offer all of their data for public
use, it's pretty sad unfortunately. I think it's safe to say that OS
OpenData should not be used as an authoritative source.

Tony


On 17 February 2015 at 11:31, Chris Hill o...@raggedred.net wrote:
 Local authorities name streets. If the name board on a street is wrong
 people tend to complain and get it replaced. If the street name on an open
 version of OS data is wrong no one complains. I would always trust the name
 board rather than OS open data. Strangely enough the names on the streets
 match the names on the paid-for versions of OS data (that we can't use in
 OSM) so I wonder how and why the OS open data has the names wrong in the
 first place.

 Cheers, Chris

 On 17 February 2015 10:03:42 GMT, Colin Smale colin.sm...@xs4all.nl wrote:

 It's only correct because that's the frame of reference you have chosen
 in this case. The local authority decides what a street is officially
 called. How that is transposed to signs sometimes introduces errors, and
 these errors are sometimes volatile. The OS is not the source of the
 official name either is it?





 On 2015-02-17 10:45, Philip Barnes wrote:

 On Mon Feb 16 23:35:41 2015 GMT, Pmailkeey . wrote:

 On 16 February 2015 at 15:51, Philip Barnes p...@trigpoint.me.uk wrote:

 In these cases you should check the name on the signs and if osm is wrong
 correct it. I my experience osm is often right and os opendata is incorrect,
 in these cases add the opendata name to a not:name tag. Where osm in
 incorrect it is often caused by an awkward spelling, so a photo can be
 useful. Sommerfeld Road in Telford took me a few attempts to get right,
 originally mapped as Summerfield. Phil (trigpoint)

 What's the general consensus where *current *OS data and the sign is wrong
 ? Should OSM show the wrong name but flag it as being wrong or show the
 correct name and add the wrong name as a not:name ?

 OSM should show the correct name, which is the one on the sign.

 Not:name is there to suppress the error and to indicate a mapper has
 surveyed it and shown the OS are incorrect.

 From my experience OSM is usually correct, the biggest cause of error is
 OS getting apostrophes wrong, and if OSM is wrong it is usually a weird
 spelling where the mapper has remembered the name but has forgotten how it
 was spelt.

 Phil (trigpoint )

 

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[Talk-GB] OS OpenData Layer down?

[tony wroblewski]

Hi

I've been unable to access the OS OpenData layer in both JOSM and ID.
Has the address or URL changed, or is the server just down at the
moment?

Tony

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Re: [Talk-GB] OS OpenData Layer down?

[tony wroblewski]

Thanks Andy

Yep, I guess it's hosted on faffy, and it's currently down.

Cheers for the link

Tony


On 29 November 2014 at 13:29, SomeoneElse li...@atownsend.org.uk wrote:
 On 29/11/2014 12:16, tony wroblewski wrote:

 Hi

 I've been unable to access the OS OpenData layer in both JOSM and ID.
 Has the address or URL changed, or is the server just down at the
 moment?


 Server room maintenance perhaps?

 There's some work mentioned here:

 http://wiki.osm.org/wiki/Platform_Status

 (I'm aware that at least one other server is currently temporarily down)

 Cheers,

 Andy


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[Talk-GB] Tagging Residential Retail zones

[tony wroblewski]

Hi All

How do people normally go about tagging a landuse area which has both
residential and retail buildings. In many areas buildings often are
both residential and retail, in that the upstairs areas are rented
apartments, and the downstairs is shop. I'm not sure how to go about
correctly tagging the surrounding landuse, but so far I've been doing
it predominately on what the majority of the buildings are, i.e. If
the majority of the buildings and shops then the area is retail, etc.

Tony

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Re: [OSM-talk] UK is turning blue?

[tony wroblewski]

:-)

Hit refresh, it seems to be fixed now.

On 18 August 2014 10:17, Nick Whitelegg nick.whitel...@solent.ac.uk wrote:

 The endless rain of 2014 might though ;-)

 (sorry for the flippant comment)

 -SomeoneElse li...@mail.atownsend.org.uk wrote: -
 To: talk@openstreetmap.org
 From: SomeoneElse li...@mail.atownsend.org.uk
 Date: 17/08/2014 09:41PM
 Subject: Re: [OSM-talk] UK is turning blue?

 On 17/08/2014 20:34, Ruben Maes wrote:
 It's doing it again – the UK is going blue once more!

 Does anyone know what the problem is? Last time, was it a broken
 coastline in the end?

 The Coastline view in OSMI http://tools.geofabrik.de/osmi/ suggests a
 self-intersection problem roughly here:

 http://www.openstreetmap.org/edit?editor=potlatch2#map=20/56.68761/-6.09413

 Not sure if a self-intersection would cause this flooding though...

 Cheers,

 Andy


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Re: [Talk-GB] New mapper has imported all Nottingham street lights

[tony wroblewski]

Actually, this type of import would have been very useful for my own
project which uses OSM data for 3D maps. I was a little miffed to see
it was simply reverted with no discussion. Good detailed data such as
this is lacking very much in the UK, and we're very far behind other
countries such as Germany. This sort of action I fear only scares
others off from doing the same thing.

Tony


On 30 July 2014 19:12, Brian Prangle bpran...@gmail.com wrote:
 The source is opendata from Nottingham and the data refers to a physical
 entity- so why revert it except to enforce a point of etiquett? The
 criterion of usefulness is not valid. I thought the whole point of entering
 data is that someone somewhere will find a use for it - you might not see
 its usefulness, but how can you know if it's not of some use to someone
 else? Contact the user and try to engage them - not piss them off  by
 removing their hard work

 Regards

 Brian


 On 29 July 2014 21:51, SK53 sk53@gmail.com wrote:

 Don't need to say much more, other than it's an undiscussed import and if
 we'd thought it would be useful could have done it anytime in the past 18
 months.

 Changeset is : https://www.openstreetmap.org/changeset/24412110

 Will plan to revert in 1 days time if no further action by the mapper.

 Jerry

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Re: [OSM-talk] [Talk-GB] UK is turning blue?

[tony wroblewski]

I was also about to report this, I noticed this last night. It seems
that there is a gap in the coastline somewhere

I initially thought it was something I did, as I was editing the
coastline around Runcorn/North Wales a few days ago but I can't find
any issues after some time searching, and the coastline is all
connected up correctly (it seems).

It looks like it's actually spread across the entire country, and as
Mapnik is rerendering tiles it's being broken. I've tried the
coastline validator tool, and also downloaded large parts of the
coastline into JOSM but can't find the error. Does anyone know what
else we can do here?

Tony

On 18 June 2014 08:27, Colin Smale colin.sm...@xs4all.nl wrote:


 It only appears to be happening on areas with the default landuse -
 residential, farms etc are rendered normally. That might be a clue. So far
 it seems to be limited to an area in central England but it may spread. The
 boundaries of the area are straight, and along tile boundaries. It only
 appears at z11-z13. On this map, the left half is blue (last rendered June
 17) and the right half is normal (last rendered June 10).

 http://www.openstreetmap.org/#map=12/52.0770/-0.7172



 On 2014-06-18 01:10, Michael Kugelmann wrote:

 Am 18.06.2014 00:41, schrieb Colin Smale:

 why the UK is turning blue on openstreetmap.org?

 Flood due to massive rain? Heavy tide?;-)

 Maybe the coastline is broken (or was changed) or something like that...


 Cheers,
 Michael.


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Re: [Talk-GB] [OSM-talk] UK is turning blue?

[tony wroblewski]

I was also about to report this, I noticed this last night. It seems
that there is a gap in the coastline somewhere

I initially thought it was something I did, as I was editing the
coastline around Runcorn/North Wales a few days ago but I can't find
any issues after some time searching, and the coastline is all
connected up correctly (it seems).

It looks like it's actually spread across the entire country, and as
Mapnik is rerendering tiles it's being broken. I've tried the
coastline validator tool, and also downloaded large parts of the
coastline into JOSM but can't find the error. Does anyone know what
else we can do here?

Tony


On 18 June 2014 08:27, Colin Smale colin.sm...@xs4all.nl wrote:


 It only appears to be happening on areas with the default landuse -
 residential, farms etc are rendered normally. That might be a clue. So far
 it seems to be limited to an area in central England but it may spread. The
 boundaries of the area are straight, and along tile boundaries. It only
 appears at z11-z13. On this map, the left half is blue (last rendered June
 17) and the right half is normal (last rendered June 10).

 http://www.openstreetmap.org/#map=12/52.0770/-0.7172



 On 2014-06-18 01:10, Michael Kugelmann wrote:

 Am 18.06.2014 00:41, schrieb Colin Smale:

 why the UK is turning blue on openstreetmap.org?

 Flood due to massive rain? Heavy tide?;-)

 Maybe the coastline is broken (or was changed) or something like that...


 Cheers,
 Michael.


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Re: [Talk-GB] [OSM-talk] UK is turning blue?

[tony wroblewski]

I was also about to report this, I noticed this last night. It seems
that there is a gap in the coastline somewhere

I initially thought it was something I did, as I was editing the
coastline around Runcorn/North Wales a few days ago but I can't find
any issues after some time searching, and the coastline is all
connected up correctly (it seems).

It looks like it's actually spread across the entire country, and as
Mapnik is rerendering tiles it's being broken. I've tried the
coastline validator tool, and also downloaded large parts of the
coastline into JOSM but can't find the error. Does anyone know what
else we can do here?

Tony

On 18 June 2014 08:27, Colin Smale colin.sm...@xs4all.nl wrote:


 It only appears to be happening on areas with the default landuse -
 residential, farms etc are rendered normally. That might be a clue. So far
 it seems to be limited to an area in central England but it may spread. The
 boundaries of the area are straight, and along tile boundaries. It only
 appears at z11-z13. On this map, the left half is blue (last rendered June
 17) and the right half is normal (last rendered June 10).

 http://www.openstreetmap.org/#map=12/52.0770/-0.7172



 On 2014-06-18 01:10, Michael Kugelmann wrote:

 Am 18.06.2014 00:41, schrieb Colin Smale:

 why the UK is turning blue on openstreetmap.org?

 Flood due to massive rain? Heavy tide?;-)

 Maybe the coastline is broken (or was changed) or something like that...


 Cheers,
 Michael.


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[Talk-GB] 2014 OS OpenData

[tony wroblewski]

Hi All

Does anyone know how recent the OS StreetView data is, and if/when the
update cycle is for the datasource in JOSM? I received an email from
OS this morning about the release of the new 2014 maps, but it seems
to me the OS StreetView data is maybe 2-3 years old now, and it some
parts maybe unreliable. I've been using it to trace farms, rivers,
ponds etc, so this data is fairly static, but I have noticed areas
that seem quite out of date.

Tony

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Re: [Talk-GB] 2014 OS OpenData

[tony wroblewski]

Thanks Jerry, that's good to know.

This data is quite good for tracing water areas obscured by woodland
on the aerial photography. Also, it seems the highest zoom levels have
all but disappeared in Cheshire and Merseyside.

Tony


On 9 May 2014 11:23, SK53 sk53@gmail.com wrote:
 Grant normally updates it when a new release is made.

 Last year he did a diff between all the various releases. See:
 https://lists.openstreetmap.org/pipermail/talk-gb/2013-November/015526.html

 Jerry


 On 9 May 2014 09:57, tony wroblewski tony.wroblew...@gmail.com wrote:

 Hi All

 Does anyone know how recent the OS StreetView data is, and if/when the
 update cycle is for the datasource in JOSM? I received an email from
 OS this morning about the release of the new 2014 maps, but it seems
 to me the OS StreetView data is maybe 2-3 years old now, and it some
 parts maybe unreliable. I've been using it to trace farms, rivers,
 ponds etc, so this data is fairly static, but I have noticed areas
 that seem quite out of date.

 Tony

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Re: [Talk-GB] Bing imagery

[tony wroblewski]

I noticed this also in a few areas, it seems the high resolution has been
removed. It's still present around Chester though, so it isn't everywhere

Regards

Tony



On 2 March 2014 12:21, Filip Chirita Rares Cristian chirita.ra...@gmail.com
 wrote:

 Any comment from Microsoft on this?

 Chris


 On Sat, Mar 1, 2014 at 6:56 PM, SK53 sk53@gmail.com wrote:

 My impression is that the 2008 imagery (zoom 20 and 21 is still available
 in JOSM). It certainly would be a disappointment because the 2008 imagery
 was taken in good sunlight and is mostly directly overhead.

 Jerry


 On 1 March 2014 18:41, Will Phillips wp4...@gmail.com wrote:

 Since about last Tuesday, the highest resolution Bing aerial imagery is
 no longer available in the Nottingham and Derby area. Previously the
 imagery went up to zoom level 22, but this has now been reduced to level
 19. I was wondering whether this is also the case in other parts of the
 country?

 I was hoping it was only a temporary problem, but I now guess it's
 probably not. If it has gone for good, I will certainly miss it for tracing
 buildings.

 For what it's worth, I notice that the zoom level 20 imagery is still
 displayed when viewing it on the Bing website, but I appreciate we aren't
 allowed to use it directly from there.

 Regards,
 Will


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 --
 Life is not the amount of times you breathe, is the moments that take your
 breath away.

 To all things comes an end. And to all things comes a beginning.

 Cred in inspirat, nu in expirat. in vise, nu in somn. In trait, nu in
 existat.

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Re: [Talk-GB] Possible vandalism? New Forth Road Bridge being changed to motorway from construction

[tony wroblewski]

Hi Donald

I had a similar problem with a user adding random buildings to places that
don't exist, as well as really badly mapped areas with
intersecting/crossing buildings and incorrectly tagged areas. the user in
question never got back to me. It seems to me like he was using OSM as a
sandbox, to play around. I've often thought that maybe schools are using it
for student projects, or something similar.

I'm not sure how to deal with this, apart from reverting the changes. Seems
to me like some sort of moderation is needed on OSM, or at least a grading
system. i.e. Once a user has done enough contributions which have been
approved, you no longer need approval. In practice, something like this
would be very hard to implement.

Regards

Tony




On 9 February 2014 21:32, Donald Noble drno...@gmail.com wrote:

 Hi All,

 The user robbief14 [1] has changed sections of the M90 around the New
 Forth Road Bridge which are still currently under construction to live
 motorway. They had also deleted all of the tags for the current road bridge.

 I therefore reverted this changeset before further changes were made, and
 send a polite email asking why they had done it and if they realise they
 were affecting the map for everyone.

 No response to this message, however they have changed the crossing back
 to motorway. See [2] below for relevant changesets.

 I would appreciate somebody else trying to contact this user.

 regards, Donald



 [1] http://www.openstreetmap.org/user/robbief14
 [2]
 original changeset: http://www.openstreetmap.org/changeset/20442315
 my revert: http://www.openstreetmap.org/changeset/20452252
 changed back to motorway again:
 http://www.openstreetmap.org/changeset/20458591

 --
 Donald Noble
 http://drnoble.co.uk - http://flickr.com/photos/drnoble

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[Talk-GB] Question regarding OS Opendata

[tony wroblewski]

Hi

I have a question regarding the OS Opendata. How accurately aligned is it?
I've noticed that in some places the bing orphophotos match up almost
perfectly to the buildings below, and it other areas there can be some
difference (sometimes up to a meter of). Taking into account the angle the
photo was taken from the air, and ground elevation, which should be
considered more accurate?

Generally, when adding buildings I trace the outline of the building on
opendata, and then using bing aerial, I split the building shape up and add
details. I generally have to continually align the bing aerial photo
scenery to match the areas on opendata. Even on small areas, the
differences can be quite a bit, and I'm doing my best to continually align
and adjust.

I'm asking (questioning accuracy), since the opendata seems pretty old,
forested areas aren't often shaped or are missing and buildings are often
missing. Whilst the orphophotos are also fairly old, they still seem more
up-to-date in some areas.

Regards

Tony
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Re: [Talk-GB] Question regarding OS Opendata

[tony wroblewski]

Thanks for the information.

With regards to buildings, What I mean is that normally I add both an
OpenData transparent layer and the bing layer in JOSM, and can see that
sometimes they align quite nicely, and sometimes there is a noticable
difference. People seem to generally map buildings using the bing layer
without any alignment, or taking parallax into account.

Generally I like to believe that the ordnance survery data is more correct,
but sometimes it contains large errors, such as missing, badly shaped
forests or completely missing buildings. I'm guessing it's quite difficult
to get it really accurate, even when using a GPS, so I guess it's best to
stick to whichever is the most accurate.

Tony



On 27 December 2013 18:09, David Woolley for...@david-woolley.me.uk wrote:

 On 27/12/13 15:07, tony wroblewski wrote:

 Hi

 I have a question regarding the OS Opendata. How accurately aligned is
 it? I've noticed that in some places the bing orphophotos match up
 almost perfectly to the buildings below, and it other areas there can be
 some difference (sometimes up to a meter of). Taking into account the
 angle the photo was taken from the air, and ground elevation, which
 should be considered more accurate?


 Neither is perfect.  My own preference is to assume that the OpenData
 stuff is usually more accurately aligned than Bing, which can suffer from
 quite large parallax errors, however it depends on exactly where you are,
 and Bing may sometimes be more accurate.

 I believe that the OpenData overlay used for the OSM tiles has not been
 corrected for the known errors between OSGB and WGS84, so is not as good as
 it might be.

 If Bing matches buildings on the map, that is because they were mapped
 from the Bing images, without any correction.


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