Re: [Talk-GB] Viability of huge shapefile of LandForm Panorama contours in Mapnik?
Hi Nick, Nick Whitelegg wrote: Sometime, perhaps over Easter, I'd like to do something I've been meaning to do for a while, and that is create pseudo-Landranger maps by combining OS Vector Map District, contours from OS Landform Panorama, and OSM footpaths. I will naturally be interested to see what you come up with! The amount of data involved is large. I did mine on about 20 medium Amazon EC2 instances, and it took a couple of days IIRC. This was with my own code to parse the OS data and a renderer based on AGG. One issue that I would like to look at at some point is how to heal the contours. The lines in the OS download are truncated on steep ground where they would be too close together on a printed map. (I think that the 50m contours are always continuous.) I'd like to thread these broken contours between their neighbours. I have some vague ideas about how to do this; maybe something like: - Make a Delaunay triangulation of all the points in all the contours. - For each edge in the triangulation, if the ends have a height difference of more than 10m, insert additional points equally spaced along the edge. - Re-triangulate including the new points. - Discard all edges whose ends have different heights. - The remaining edges are the new contours. Has anyone here ever tried to do anything like this? Regards, Phil. ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Viability of huge shapefile of LandForm Panorama contours in Mapnik?
On Mon, Mar 7, 2011 at 12:27 PM, Phil Endecott spam_from_os...@chezphil.org wrote: One issue that I would like to look at at some point is how to heal the contours. Why not generate contours from the DTM using e.g. gdal_contour? Or are the contours at a significantly different precision from the DTM that comes with it? Cheers, Andy ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Reminder: Nottingham OSM pub-meetup, this Tuesday 8th March
Reminder that we're having a pub meet-up in Nottingham is this Tuesday 8th March from 7:30 pm, Sir John Borlase Warren, Canning Circus, Nottingham NG7 3GD. http://wiki.openstreetmap.org/wiki/Nottingham/Pub_Meetup Cheers Jerry ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Ordnance Survey Public Sector Mapping Agreement
For those that haven't seen, the Ordnance Survey is going to provide local authorities with access to its maps free of charge from April 1st. http://www.ordnancesurvey.co.uk /oswebsite/business/sectors/government/publicpsmafaqs.html This doesn't directly affect OSM but it will provide tougher competition when we try to persuade local councils to use OSM. -- Ed Avis e...@waniasset.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Ordnance Survey Public Sector Mapping Agreement
On 7 March 2011 18:17, Ed Avis e...@waniasset.com wrote: For those that haven't seen, the Ordnance Survey is going to provide local authorities with access to its maps free of charge from April 1st. http://www.ordnancesurvey.co.uk /oswebsite/business/sectors/government/publicpsmafaqs.html This doesn't directly affect OSM but it will provide tougher competition when we try to persuade local councils to use OSM. On the other hand, it's great to see that our gratis offering is already pushing down the price of the opposition. -- Matt Williams http://milliams.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] Welsh Street Map
I have a spreadsheet containing a list of 1800 streets and the official Welsh names agreed by Wrexham Council a number of years ago. Ultimately I would like to produce a Welsh version of the OSM streets in the area. Is there a way of adding the name:cy without manually searching for each English name. I would not want to overwrite any existing Welsh names. -- www.dragontail.co.uk ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Welsh Street Map
Andy Berry andynberry@... writes: I have a spreadsheet containing a list of 1800 streets and the official Welsh names agreed by Wrexham Council a number of years ago. Ultimately I would like to produce a Welsh version of the OSM streets in the area. Is there a way of adding the name:cy without manually searching for each English name. I would not want to overwrite any existing Welsh names. You could use a script to do this. Please post a link to the file you have and I or somebody else (I'll have time this weekend) will hack up something to download the existing OSM data, check the names, and (if you choose to do so) upload the name:cy tags. -- Ed Avis e...@waniasset.com ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
