Re: [Talk-GB] Ordnance Survey
On 1 Apr 2010, at 01:16, Phil Monger wrote: Hi Tom, Not sure I agree that Streetview is 'horrible' - as a free base map it will rival or beat any of the others I have seen. This is even more true for rural areas. I am aware most of the raster stuff got left out, but streetview *is* raster - it says as much in the PDF. What we would want to do, I think, is encourage people to rapidly trace this to form a base map, then set upon the task of checking it for accuracy. Secondly, adding to it all the great features that we know from OSM - with the time burden or walking all the streets gone, that second part should progress more rapidly. But I want to go out on my bike and map, I spend enough time at the computer as it is, without sitting there tracing, missing out on various details that are not or are wrong on the OS maps. Shaun Phil On 1 April 2010 00:47, Tom Hughes t...@compton.nu wrote: On 01/04/10 00:06, Phil Monger wrote: The streetview announcement is FANTASTIC news for OSM in the UK - as the database is pretty much exactly what is being built - roads / streets / names , etc. StreetView is horrible - the vector data will be far more useful. We can surely get this as a backdrop layer, like the Yahoo imagery? I suspect that will be the best approach, yes. We'll probably want to wait for the Vector Map District release in May though as that will be a better data set than Meridian 2. Of course Boundary Line will also be useful for tracing and that should be available tomorrow. All this assume the license is OK of course, which we won't know until we see it. A bulk import wouldn't be possible, as this is raster data. (Though the rest of the datasets seem to have a vector element, borders ect) It's not raster data. Almost all the raster data got left out. Exciting times ... I'll finally have some backing for my small Lincolnshire village without needing to go out and GPS trace the entire place If it's only a small village then surveying it wouldn't take long anyway ;-) Plus you'll get all sorts of detail that the OS mapping won't have. Tom -- Tom Hughes (t...@compton.nu) http://compton.nu/ ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
The problem with Meridian 2 is that it's a sampled set, so it's not as spatially accurate as we would like. The objects are present, but we can do better with shape if we wait, as TomH says, till the Vector Map District. We know that with lots of high quality GPS traces we can get very close to the top quality level of the OS in terms of road alignments, but where we have few traces, or the current data has been obtained from NPE for instance, then anything that the OS has is almost certainly going to be better. We are still going to need to walk/cycle all the streets, lots of other stuff, POI's and landuse info still to collect that's not in any of the OS datasets (Even MasterMap), but its going to be a great tool for verification and general improvements in our data. I'd suggest we hit Boundary data first, its an easy win and will fix so many problems with our current boundary relations. Cheers Andy -Original Message- From: talk-gb-boun...@openstreetmap.org [mailto:talk-gb- boun...@openstreetmap.org] On Behalf Of Phil Monger Sent: 01 April 2010 1:17 AM To: talk-gb Subject: Re: [Talk-GB] Ordnance Survey Hi Tom, Not sure I agree that Streetview is 'horrible' - as a free base map it will rival or beat any of the others I have seen. This is even more true for rural areas. I am aware most of the raster stuff got left out, but streetview *is* raster - it says as much in the PDF. What we would want to do, I think, is encourage people to rapidly trace this to form a base map, then set upon the task of checking it for accuracy. Secondly, adding to it all the great features that we know from OSM - with the time burden or walking all the streets gone, that second part should progress more rapidly. Phil On 1 April 2010 00:47, Tom Hughes t...@compton.nu wrote: On 01/04/10 00:06, Phil Monger wrote: The streetview announcement is FANTASTIC news for OSM in the UK - as the database is pretty much exactly what is being built - roads / streets / names , etc. StreetView is horrible - the vector data will be far more useful. We can surely get this as a backdrop layer, like the Yahoo imagery? I suspect that will be the best approach, yes. We'll probably want to wait for the Vector Map District release in May though as that will be a better data set than Meridian 2. Of course Boundary Line will also be useful for tracing and that should be available tomorrow. All this assume the license is OK of course, which we won't know until we see it. A bulk import wouldn't be possible, as this is raster data. (Though the rest of the datasets seem to have a vector element, borders ect) It's not raster data. Almost all the raster data got left out. Exciting times ... I'll finally have some backing for my small Lincolnshire village without needing to go out and GPS trace the entire place If it's only a small village then surveying it wouldn't take long anyway ;-) Plus you'll get all sorts of detail that the OS mapping won't have. Tom -- Tom Hughes (t...@compton.nu) http://compton.nu/ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.791 / Virus Database: 271.1.1/2782 - Release Date: 03/31/10 19:32:00 ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
On 01/04/10 01:16, Phil Monger wrote: Not sure I agree that Streetview is 'horrible' - as a free base map it will rival or beat any of the others I have seen. This is even more true for rural areas. Well the cartography is horrible - the data is fine I'm sure. There just isn't much detail beyond roads and houses. I am aware most of the raster stuff got left out, but streetview *is* raster - it says as much in the PDF. Sure, I just don't think it's a hugely useful data set for us if we're going to have decent vector data available. What we would want to do, I think, is encourage people to rapidly trace this to form a base map, then set upon the task of checking it for accuracy. Secondly, adding to it all the great features that we know from OSM - with the time burden or walking all the streets gone, that second part should progress more rapidly. What on earth would be the point of creating our own vector data from StreetView though. I could understand tracing it into OSM but tracing it into a separate base map before we've even seen what will be in Vector Map District is just insane. Anyway, you still need to walk the streets to collect other information, and walking the streets is at least half the fun of OSM! As Andy says, I say we start with getting boundary data fixed up from Boundary Line and then look at Vector Map District in a month's time and decide what the next step is. Tom -- Tom Hughes (t...@compton.nu) http://compton.nu/ ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Telling the world about OSM / OpenOS
There's lots of interesting discussion about what we might do with the opened Ordnance Survey data, but I think we need to get one thing straight immediately: what do we tell the outside world if anyone asks, does this mean OSM is redundant? A very simple line, something like: The OS data could make a useful contribution towards OpenStreetMap, which in addition already offers: - A wider variety of data such as cycle networks and parking, public transport data, public and private amenities, and much more - A toolchain to help people edit, download, analyse, print, render and otherwise use the data - Global coverage, integrating OS data with data imported from a number of other national mapping agencies Any advances? Tom -- http://tom.acrewoods.net http://twitter.com/tom_chance ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
As Andy says, I say we start with getting boundary data fixed up from Boundary Line and then look at Vector Map District in a month's time and decide what the next step is I agree with this; especially as boundary data is hard to come by any other way In the mean time, can't we just import everything that's available into a database which can be fronted by the OpenOS website that SteveC announced he had secured last week? You could have a database with all of the vector data - which gets rendered - and is displayed as a different layer along with the OS raster stuff. Could use those as a WMS layer for JOSM/Potlatch etc. The data itself could be accessible via an API. Bit like osm.org really. That way, it'd be easy to compare the OS datasets with each other and the OSM data - and we can import anything if-and-when we're ready to - and could import stuff more locally if necessary. Would also be a useful single-point-of-contact for all of the OSOpenData stuff. Any thoughts? (note however that although I am willing to help, I probably don't have the technical know-how to actually put this into action.) ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
On 1 April 2010 09:25, Richard Fairhurst rich...@systemed.net wrote: Gregory wrote: Without restrictions? Does that mean no attribution, it sounds like PD. Or does it mean they haven't told us the exact license yet but it will be nice? The latter, I think. http://www.ordnancesurvey.co.uk/opendata/ is either still password-protected or Slashdotted as I write (well, more likely Guardian-ed)... a prize to the first person who can get through and find out. ;) It's up and available: http://www.ordnancesurvey.co.uk/oswebsite/opendata/licence/docs/licence.pdf The main wrinkle seems to be this part on their requirement for attribution: include the same acknowledgement requirement in any sub-licenses of the data that you grant, and a requirement that any further sub-licenses do the same Can anyone comment on what that means for us, i.e. whether a simple note on the wiki as per other imports will suffice? Regards, Tom -- http://tom.acrewoods.net http://twitter.com/tom_chance ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Telling the world about OSM / OpenOS
Off the top of my head: - A wide collection of existing tools (rendering, checking, visualisations, etc). Actually I see you said toolchain. - Still up to date, potentially within minutes. The OS data can help us get to a 'finished' point, and focus on updating. Especially with changing things like shops, that the OS don't have. Response to disasters in the UK? - People to go to the pub with. Oh, I mean community and the stuff that brings beyond friends who can bake cakes. I'm sure I thought of something else 10 seconds ago. For now I will go with: OSM also offers a daily glossy magazine Steve to foundation members. :) On 1 April 2010 01:18, Tom Chance t...@acrewoods.net wrote: There's lots of interesting discussion about what we might do with the opened Ordnance Survey data, but I think we need to get one thing straight immediately: what do we tell the outside world if anyone asks, does this mean OSM is redundant? A very simple line, something like: The OS data could make a useful contribution towards OpenStreetMap, which in addition already offers: - A wider variety of data such as cycle networks and parking, public transport data, public and private amenities, and much more - A toolchain to help people edit, download, analyse, print, render and otherwise use the data - Global coverage, integrating OS data with data imported from a number of other national mapping agencies Any advances? Tom -- http://tom.acrewoods.net http://twitter.com/tom_chance ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb -- Gregory o...@livingwithdragons.com http://www.livingwithdragons.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
On 01/04/10 09:39, Richard Bullock wrote: You could have a database with all of the vector data - which gets rendered - and is displayed as a different layer along with the OS raster stuff. Could use those as a WMS layer for JOSM/Potlatch etc. The data itself could be accessible via an API. Bit like osm.org really. There is a viewer on the OS web site (when you can get in). Obviously we will need to set up WMS or something for tracing of certain layers as well. Tom -- Tom Hughes (t...@compton.nu) http://compton.nu/ ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
And again, I sent this to Richard instead of Talk-GB On 1 April 2010 09:44, Russ Phillips r...@phillipsuk.org wrote: On 1 April 2010 09:25, Richard Fairhurst rich...@systemed.net wrote: Gregory wrote: Without restrictions? Does that mean no attribution, it sounds like PD. Or does it mean they haven't told us the exact license yet but it will be nice? The latter, I think. http://www.ordnancesurvey.co.uk/opendata/ is either still password-protected or Slashdotted as I write (well, more likely Guardian-ed)... a prize to the first person who can get through and find out. ;) My reading of it is that it's roughly equivalent to CC-BY. There's a paragraph at the end that says: These terms have been aligned to be interoperable with any Creative Commons Attribution 3.0 Licence. This means that you may mix the information with Creative Commons licensed content to create a derivative work that can be distributed under any Creative Commons Attribution 3.0 Licence. A more sensible approach: Let's use OS data as one of the many sources that helps us map. Quite often I'll add something to the map based on a combination of survey, previous experience, out-of-copyright sources (e.g. NPE), maybe an openly licensed photo (e.g. Geograph), other map information (e.g. street names on NAPTaN nodes), and so on; I'm sure most OSMers are similarly catholic. OS data is one more source. I'd be happy using OS data to help complete Banbury and Worcester, for example, because these are places I know well; I can bring something extra to the map. But I don't think it would do OSM, or any users, any favours if I were to import OS data for Bradford, where I've never been. If you want the raw OS map of Bradford, you might as well use the OS map. The guy who knows Bradford should be the one to add those streets into OSM. I'm inclined to agree. I'm originally from Maltby, a mining village near Rotherham in South Yorkshire. I've been slowly mapping it with my GPS when I've gone to visit people, and I've added some roads from NPE. I know it well enough to be sure that the roads I add from NPE are still there. In the same way, I could use OS data to add roads, then use on-the-ground surveying to add more detail as when I get the chance. Russ ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
On 1 April 2010 00:47, Shaun McDonald sh...@shaunmcdonald.me.uk wrote: is encourage people to rapidly trace this to form a base map, then set upon the task of checking it for accuracy. But I want to go out on my bike and map, I spend enough time at the computer as it is, without sitting there tracing, missing out on various details that are not or are wrong on the OS maps. Shaun I encourage you to rapidly go out on your bike and beat the people mapping at their computer. I know you can be quite fast and would travel wherever people were copying OS. My interest from the OS is helping out OSM-dragon places such as Cornwall. It's a lot easier to get people like my parents adding features if the basic structure exists (plus they don't have a GPS). They're going down there this weekend, but sadly I don't think that's enough time for me to add the roads of the local town in. -- Gregory o...@livingwithdragons.com http://www.livingwithdragons.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Mirror of OS data downloads
Someone helpful at MySociety has published a mirror of the open data: http://parlvid.mysociety.org:81/os/ Martin, ** CycleStreets - For Cyclists, By Cyclists Developer, CycleStreets ** http://www.cyclestreets.net/ ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Mirror of OS data downloads
On Thu, 1 Apr 2010, Martin - CycleStreets wrote: Someone helpful at MySociety has published a mirror of the open data: http://parlvid.mysociety.org:81/os/ and it's now also at: http://data.gov.uk/data/publicbody/Ordnance%20Survey ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Ordnance Survey
Regarding the OS datasets, here is a suggestion: use it is to update the name tag and fill in the missing gaps in attributes. For most of the datasets, the quality of the positional information (that's the geometry) is lower than that of OSM and it will make much more sense just to identify where there are overlaps and a road can be recognised quite well, so the attributes can be transferred... Cheers Muki -- Dr. Muki Haklay: Senior Lecturer in GIS Department of Civil, Environmental Geomatic Engineering University College London (UCL) Gower St. London WC1E 6BT T: +44 20 7679 2745 E: m.hak...@ucl.ac.uk mailto:m.hak...@ucl.ac.uk W: http://www.ge.ucl.ac.uk/~mhaklay/ http://www.ge.ucl.ac.uk/%7Emhaklay/ Towards Successful Suburban Town Centres - www.sstc.ucl.ac.uk http://www.sstc.ucl.ac.uk/ Bridging the Gaps - www.ucl.ac.uk/btg http://www.ucl.ac.uk/btg/ Mapping for Change - www.mappingforchange.org.uk http://www.mappingforchange.org.uk Po ve Sham blog - povesham.wordpress.com http://povesham.wordpress.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
Meridian covers the countryside - but the data is derived at lower resolution than in urban area, and some small roads are missing. Muki On 01/04/2010 12:16, Nick Whitelegg wrote: From the grough site: http://www.grough.co.uk/magazine/2010/04/01/no-change-for-walkers-maps-as-os-frees-data Instead, Ordnance Survey will in May launch VectorMap District, which will include midscale data and replaces the 1:25,000 and 1:50,000 originally proposed in the consultation document but, grough can reveal, will not have footpaths and other detail vital to walkers, mountain bikers and other outdoor enthusiasts. Does that mean there's nothing at all for countryside users in the OS data being released? Or does Meridian have it? Disappointing if there's no countryside data. Nick ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb -- Dr. Muki Haklay: Senior Lecturer in GIS Department of Civil, Environmental Geomatic Engineering University College London (UCL) Gower St. London WC1E 6BT T: +44 20 7679 2745 E: m.hak...@ucl.ac.uk mailto:m.hak...@ucl.ac.uk W: http://www.ge.ucl.ac.uk/~mhaklay/ http://www.ge.ucl.ac.uk/%7Emhaklay/ Towards Successful Suburban Town Centres - www.sstc.ucl.ac.uk http://www.sstc.ucl.ac.uk/ Bridging the Gaps - www.ucl.ac.uk/btg http://www.ucl.ac.uk/btg/ Mapping for Change - www.mappingforchange.org.uk http://www.mappingforchange.org.uk Po ve Sham blog - povesham.wordpress.com http://povesham.wordpress.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
Does that mean there's nothing at all for countryside users in the OS data being released? Or does Meridian have it? Sorry to follow up my own post - it would appear not. A real shame about the lack of countryside data in this free OS dataset. The Meridian data doesn't really contain anything that isn't in OSM already, and it's the countryside stuff, particularly things like field boundaries and wood outlines, and exact courses of rights of way, that would be really valuable. Oh well, at least it still means I can continue to spend my time mapping the footpaths, I guess. Nick ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
I'm not sure the OS has reliable footpath data for the countryside anyway. Last time I chatted with the OS about this they were interested in whether OSM could work with them to update rural ROW footpaths because they don't survey them anymore. Cheers Andy -Original Message- From: talk-gb-boun...@openstreetmap.org [mailto:talk-gb- boun...@openstreetmap.org] On Behalf Of Nick Whitelegg Sent: 01 April 2010 12:23 PM To: talk-gb@openstreetmap.org Subject: Re: [Talk-GB] Ordnance Survey Does that mean there's nothing at all for countryside users in the OS data being released? Or does Meridian have it? Sorry to follow up my own post - it would appear not. A real shame about the lack of countryside data in this free OS dataset. The Meridian data doesn't really contain anything that isn't in OSM already, and it's the countryside stuff, particularly things like field boundaries and wood outlines, and exact courses of rights of way, that would be really valuable. Oh well, at least it still means I can continue to spend my time mapping the footpaths, I guess. Nick ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.791 / Virus Database: 271.1.1/2782 - Release Date: 03/31/10 19:32:00 ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
Hi Andy, I'm not sure the OS has reliable footpath data for the countryside anyway. Last time I chatted with the OS about this they were interested in whether OSM could work with them to update rural ROW footpaths because they don't survey them anymore. Really? - that's interesting. Do you have a contact, seeing as I'm down their way... Thanks, Nick ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Post code map updated with a Code-Point Open layer
Hi, The Ordnance Survey OpenData released today contains a dataset called Code-Point Open giving the coordinates of about 1.5 million postcodes. I've added a layer onto the postcode area map to show this data in the same way it's been showing NPE, OSM and FreeThePostcode data for some time. Go see it here: http://random.dev.openstreetmap.org/postcodes/?layers=000F0F0FBT There's still a few bugs to be worked out: - only 25% of the original dataset is actually used (generation process uses too much RAM on my 32bit machine to do the whole thing) - not yet clipped to coastline - sub-codes ie: SW18 1 only show where the prefix is 3 chars So nothing too serious :-) Dave ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Post code map updated with a Code-Point Open layer
Looks really nice, with the colours as well! Looking at the Thames east of London, the boundary down the river between Kent and Essex looks rather suspicious. There seem to be bits of Essex with a Kent postcode and vice versa. Is this a function of clipping to the coastline that you mention? I hope it's not representative for the accuracy of the rest of the data... Colin On 01/04/2010 15:15, Dave Stubbs wrote: Hi, The Ordnance Survey OpenData released today contains a dataset called Code-Point Open giving the coordinates of about 1.5 million postcodes. I've added a layer onto the postcode area map to show this data in the same way it's been showing NPE, OSM and FreeThePostcode data for some time. Go see it here: http://random.dev.openstreetmap.org/postcodes/?layers=000F0F0FBT There's still a few bugs to be worked out: - only 25% of the original dataset is actually used (generation process uses too much RAM on my 32bit machine to do the whole thing) - not yet clipped to coastline - sub-codes ie: SW18 1 only show where the prefix is 3 chars So nothing too serious :-) Dave ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
On Thu, 2010-04-01 at 12:22 +0100, Nick Whitelegg wrote: Does that mean there's nothing at all for countryside users in the OS data being released? Or does Meridian have it? Sorry to follow up my own post - it would appear not. A real shame about the lack of countryside data in this free OS dataset. The Meridian data doesn't really contain anything that isn't in OSM already, and it's the countryside stuff, particularly things like field boundaries and wood outlines, and exact courses of rights of way, that would be really valuable. Oh well, at least it still means I can continue to spend my time mapping the footpaths, I guess. While not directly of interest to OSM, I think the elevation data could be quite useful. Does anyone know how it compares to the SRTM data most people currently use? Keith. ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey
Tom Hughes [mailto:t...@compton.nu] wrote: Sent: 01 April 2010 3:06 PM To: Kai Krueger Cc: Andy Robinson (blackadder-lists); 'talk-gb' Subject: Re: Ordnance Survey On 01/04/10 14:42, Kai Krueger wrote: Perhaps even easier and a bigger win, would be to import the postcode data. It is only points anyway, so many of the aspects making data imports hard, such as connectivity and duplication, don't apply as much here. Furthermore, given postcodes are unique identifiers, it would be very easy to spot which (full) postcodes are already in the database and only import those that aren't yet mentioned. Are random points that just mark postcodes appropriate? I know people have in the past added so called postcode centroid points but I have tended to remove those when I come across them. Likewise, You can't possibly verify them. For those thinking about all of this please refer to add add to the wiki page at: http://wiki.openstreetmap.org/wiki/Ordnance_Survey_Opendata Cheers Andy Tom -- Tom Hughes (t...@compton.nu) http://compton.nu/ No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.791 / Virus Database: 271.1.1/2782 - Release Date: 03/31/10 19:32:00 ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Post code map updated with a Code-Point Open layer
The Kent / Essex thing is simply an artefact of deriving the areas from known points. The boundaries shown are in effect we know based upon the surrounding points that the boundary is approximately here. I must say that I'm surprised at how well bits of OpenStreetMap's CT and Code-Point Open's CT tally up. I collected much of CT simply via getting postbox refs, and now that we've got most of them (83% last time I looked) they are pretty alike. -Original Message- From: talk-gb-boun...@openstreetmap.org [mailto:talk-gb- boun...@openstreetmap.org] On Behalf Of Colin Smale Sent: 1 April 2010 14:37 To: Dave Stubbs Cc: Talk GB Subject: Re: [Talk-GB] Post code map updated with a Code-Point Open layer Looks really nice, with the colours as well! Looking at the Thames east of London, the boundary down the river between Kent and Essex looks rather suspicious. There seem to be bits of Essex with a Kent postcode and vice versa. Is this a function of clipping to the coastline that you mention? I hope it's not representative for the accuracy of the rest of the data... Colin On 01/04/2010 15:15, Dave Stubbs wrote: Hi, The Ordnance Survey OpenData released today contains a dataset called Code-Point Open giving the coordinates of about 1.5 million postcodes. I've added a layer onto the postcode area map to show this data in the same way it's been showing NPE, OSM and FreeThePostcode data for some time. Go see it here: http://random.dev.openstreetmap.org/postcodes/?layers=000F0F0FBT There's still a few bugs to be worked out: - only 25% of the original dataset is actually used (generation process uses too much RAM on my 32bit machine to do the whole thing) - not yet clipped to coastline - sub-codes ie: SW18 1 only show where the prefix is 3 chars So nothing too serious :-) Dave ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Meridian2 for beginners
For anyone wanting to hack the OS data released today, I've posted a very brief tutorial on extracting data from Meridian2 with Perl: http://www.systemeD.net/blog/?p=182 cheers Richard ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey Gazetteer
A lot more farms are there as . Fm It can't be that all farms are listed as running the query only reveals 372 points with farm in the title. Probably not enough to get too excited about, maybe just deal with them manually? ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey Gazetteer
On 1 April 2010 22:40, Graham Jones grahamjones...@googlemail.com wrote: I have been playing with the Ordnance Survey 50k gazetteer to see if it looks useful (very simple search tool at http://maps2.webhop.net/openos/gaz/www/doSearch.php). As a 'point of interest' database it does not have anywhere near as much in it as OSM does, which is quite nice really, so it is less useful from that point of view, so I probably won't bother extending the search tool to display them on a map as I had intended. It does have quite a lot of named hills, and farms which might not be in OSM though, which could be useful for countryside mapping - would it be useful if I were to do a query to look for things that are in that database, but not the OSM one? Could this potentially help with is in type searches for the times where our naive algorithms aren't good enough? Could at least help supplement Nominatim? -- Matt Williams http://milliams.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
