Re: [Talk-GB] OS Open Names
OS Open Names seems at least in case I looked at not to handle curved roads as well as Codepoint in positioning centroid where most houses would be matched to correct postcode: http://oscompare.raggedred.net/?zoom=17lat=53.79255lon=-1.458961layers=B00FFTFT On Friday 05 Jun 2015 13:26:39 Chris Hill wrote: I've been looking more closely at the postcodes in the OS Open Names and there seems to be some problems with them. I've had a few comments about missing postcodes and some strange positions of a few too. I'm going to look into this and take it up with OS, but in the meantime I suggest sticking to ONS or Codepoint Open postcodes for now. -- -- ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] OS Open Names
Nice work Chris,
Cheers
Andy
-Original Message-
From: Chris Hill [mailto:o...@raggedred.net]
Sent: 03 June 2015 18:57
To: Talk-GB
Subject: [Talk-GB] OS Open Names
Hi,
I've been looking at OS Open Names, part of the Ordnance Survey Open Data. OS
notified me that OS Locator will be withdrawn, hinted that Codepoint Open will
be withdrawn too and that OS Open Names is the combined replacement. OS Open
Names is published under OGL, so it is compatible with OSM's licence.
The OS Open Names data has place names, road names and postcode centroids, all
with location fields. Original OS open data was positioned to a square metre,
the new locations have decimal parts of metres which may make them a bit more
accurate, possibly millimetre accurate.
I have extracted the postcode data from OS Open Names and generated a fresh set
of postcode tiles to look at. The centroid locations are different from the
Codepoint Open and ONS locations, but all that I have checked seem an
appropriate location, and possibly more useful. The difference is more than the
sub-metre accuracy improvements. You can use oscompare[1] to see the new
postcode centroids alongside the older centroids. I've made the Open Names
postcodes magenta to distinguish them - I think I prefer red but I'll leave
that for another day. You can use the tiles in JOSM and P2 using the url
below[2]
The OS Locator replacement has a significant drawback: OS Locator had a field
for the road name and a field for the road reference. OS Open Names ignores the
reference for any road, or section of a road, that has name, only showing the
reference for unnamed roads. (thanks to Robert
(ris) for drawing my attention to this).
I now have the data extracted and reprojected to replace OS grid refs with lon,
lat. If anyone is interested in this data I can supply it, please ask.
[1]
http://oscompare.raggedred.net/?zoom=17lat=53.95537lon=-1.03351layers=B00FFTFT
[2] http://www.raggedred.net/tiles/opennames/{z}/{x}/{y}.png
--
Cheers, Chris
user: chillly
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Re: [Talk-GB] OS Open Names
On 3 June 2015 at 18:57, Chris Hill o...@raggedred.net wrote:
You can use the tiles in JOSM
using the url below[2]
[2] http://www.raggedred.net/tiles/opennames/{z}/{x}/{y}.png
Please remind us how to add that - is it WMS or TMS?
--
Andy Mabbett
@pigsonthewing
http://pigsonthewing.org.uk
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Re: [Talk-GB] OS Open Names
The tiles are tms, the max zoom is 21, the url is as below.
I'm writing some information pages about these tiles which will include a
step-by-step guide.
Any feedback, precise or not, is welcome.
Cheers, Chris
On 4 June 2015 10:36:22 GMT+01:00, Andy Mabbett a...@pigsonthewing.org.uk
wrote:
On 3 June 2015 at 18:57, Chris Hill o...@raggedred.net wrote:
You can use the tiles in JOSM
using the url below[2]
[2] http://www.raggedred.net/tiles/opennames/{z}/{x}/{y}.png
Please remind us how to add that - is it WMS or TMS?
--
Andy Mabbett
@pigsonthewing
http://pigsonthewing.org.uk
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Re: [Talk-GB] OS Open Names
Hi Chris, Chris Hill wrote: I've been looking at OS Open Names I've also had a look at Open Names, but looking at everything except roads and postcodes. My conclusion was that it is not a useful replacement for the old 1:50k gazetteer because it doesn't contain names for any natural features. On the other hand, the new Open Map Local does include names for those features. So I think one could create a more useful gazetteer by extracting just the names from that map. And of potential interest here, road names extracted from the map can include multiple segments and non-straight-line geometry (which I don't think Open Names has). In other respects I find Open Map Local inferior to the old Street View map, e.g. its important buildings are very oddly chosen. I think the best thing in this latest release is the simplified license. Cheers, Phil. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] OS Open Names
On 03/06/15 18:57, Chris Hill wrote: the new locations have decimal parts of metres which may make them a bit more accurate, possibly millimetre accurate. I think you mean precision, not accuracy. ___ Talk-GB mailing list Talk-GB@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] OS Open Names
On 03/06/2015 18:57, Chris Hill wrote:
You can use the tiles in JOSM and P2 using the url below[2]
[2] http://www.raggedred.net/tiles/opennames/{z}/{x}/{y}.png
For Potlatch 2, I think it needs to be
http://www.raggedred.net/tiles/opennames/$z/$x/$y.png.
http://www.raggedred.net/tiles/opennames/$z/$x/$y.png
--
Steve
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[Talk-GB] OS Open Names
Hi,
I've been looking at OS Open Names, part of the Ordnance Survey Open
Data. OS notified me that OS Locator will be withdrawn, hinted that
Codepoint Open will be withdrawn too and that OS Open Names is the
combined replacement. OS Open Names is published under OGL, so it is
compatible with OSM's licence.
The OS Open Names data has place names, road names and postcode
centroids, all with location fields. Original OS open data was
positioned to a square metre, the new locations have decimal parts of
metres which may make them a bit more accurate, possibly millimetre
accurate.
I have extracted the postcode data from OS Open Names and generated a
fresh set of postcode tiles to look at. The centroid locations are
different from the Codepoint Open and ONS locations, but all that I have
checked seem an appropriate location, and possibly more useful. The
difference is more than the sub-metre accuracy improvements. You can use
oscompare[1] to see the new postcode centroids alongside the older
centroids. I've made the Open Names postcodes magenta to distinguish
them - I think I prefer red but I'll leave that for another day. You can
use the tiles in JOSM and P2 using the url below[2]
The OS Locator replacement has a significant drawback: OS Locator had a
field for the road name and a field for the road reference. OS Open
Names ignores the reference for any road, or section of a road, that has
name, only showing the reference for unnamed roads. (thanks to Robert
(ris) for drawing my attention to this).
I now have the data extracted and reprojected to replace OS grid refs
with lon, lat. If anyone is interested in this data I can supply it,
please ask.
[1]
http://oscompare.raggedred.net/?zoom=17lat=53.95537lon=-1.03351layers=B00FFTFT
[2] http://www.raggedred.net/tiles/opennames/{z}/{x}/{y}.png
--
Cheers, Chris
user: chillly
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