Re: [OSM-talk] offer of 20m contour data
Cool, i can make a nice Garmin Contour Map for New Zealand with accompaning latest OSM routable installer & dem files for fun. I'll store it on archive.org when its done. Cheers, Sam On 4/30/10, Robin Paulson wrote: > On 19 March 2010 22:32, Andy Allan wrote: >>> i don't know what a DEM is unfortunately >>> >>> this?: http://en.wikipedia.org/wiki/Digital_elevation_model >> >> Sorry, my bad. Yes, that's what I was meaning. It's basically the raw >> data behind contours, hillshading and so on. > > http://koordinates.com/layer/281-new-zealand-20m-contours/ > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > -- Twitter: @Acrosscanada Blogs: http://acrosscanadatrails.posterous.com/ http://Acrosscanadatrails.blogspot.com Facebook: http://www.facebook.com/sam.vekemans Skype: samvekemans OpenStreetMap IRC: http://irc.openstreetmap.org @Acrosscanadatrails ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On 19 March 2010 22:32, Andy Allan wrote: >> i don't know what a DEM is unfortunately >> >> this?: http://en.wikipedia.org/wiki/Digital_elevation_model > > Sorry, my bad. Yes, that's what I was meaning. It's basically the raw > data behind contours, hillshading and so on. http://koordinates.com/layer/281-new-zealand-20m-contours/ ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On Thu, Mar 18, 2010 at 9:06 PM, Robin Paulson wrote: > On 19 March 2010 01:35, Andy Allan wrote: >> Are you being offered a 20m DEM, or just the contours generated from a >> DEM? The DEM is more useful (it's a grid of spot-heights) since it can >> be used to generate hillshading etc too. > > i don't know what a DEM is unfortunately > > this?: http://en.wikipedia.org/wiki/Digital_elevation_model Sorry, my bad. Yes, that's what I was meaning. It's basically the raw data behind contours, hillshading and so on. Cheers, Andy ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On 19 March 2010 01:35, Andy Allan wrote: > Are you being offered a 20m DEM, or just the contours generated from a > DEM? The DEM is more useful (it's a grid of spot-heights) since it can > be used to generate hillshading etc too. i don't know what a DEM is unfortunately this?: http://en.wikipedia.org/wiki/Digital_elevation_model > Yes, all height data is processed completely independently. To get it > used within OSM maps and other services (e.g. height profiles on > routing websites) needs two things > > 1) The DEMs to be made available. Find some space on a webserver, and > document them on the wiki. > 2) Each individual renderer (etc) to use the DEMs. This will be > different amounts of work for different people, so I would expect some > people just to stick with SRTM unless they have a particular interest > in NZ. ok, i'll find out more and put it on the wiki. thanks andy ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On 18 March 2010 10:47, Tom Hughes wrote: >> i've been offered contours for new zealand under a cc license. the >> precision is 20m, which i believe is higher than that of the srtm >> data. >> >> how would i go about getting these into osm? from what i can tell, >> contours are generally handled differently to other data > > What do you mean by getting them into osm exactly? You're quite right that > we don't store this sort of elevation data in the main database but it > sounds like you think we have sort of parallel database of elevation data - > we don't. hmm, thanks for that. > Most people wanting elevation data just use the SRTM dataset directly. i've seen maps hosted on the osm front page which have contours, and an srtm page on the wiki. hence i thought i'd ask how they were handled. no need to go overboard, a simple "we don't concern ourselves with that" would be enough ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On 18 March 2010 11:28, Tim McNamara wrote: > I would love to get my hands on this to support emergency management > response. I'm part of the Sahana project, which provides open source > disaster planning & response tools.. you can read more about the NZ efforts > here: http://bit.ly/nz-sahana-cluster ok, i'll find out more from the contact i have, and pass it on/put him in contact with you ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On Wed, Mar 17, 2010 at 9:24 PM, Robin Paulson wrote: > i've been offered contours for new zealand under a cc license. the > precision is 20m, which i believe is higher than that of the srtm > data. Are you being offered a 20m DEM, or just the contours generated from a DEM? The DEM is more useful (it's a grid of spot-heights) since it can be used to generate hillshading etc too. > how would i go about getting these into osm? from what i can tell, > contours are generally handled differently to other data Yes, all height data is processed completely independently. To get it used within OSM maps and other services (e.g. height profiles on routing websites) needs two things 1) The DEMs to be made available. Find some space on a webserver, and document them on the wiki. 2) Each individual renderer (etc) to use the DEMs. This will be different amounts of work for different people, so I would expect some people just to stick with SRTM unless they have a particular interest in NZ. Cheers, Andy ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
Robin - I would love to get my hands on this to support emergency management response. I'm part of the Sahana project, which provides open source disaster planning & response tools.. you can read more about the NZ efforts here: http://bit.ly/nz-sahana-cluster Cheers, Tim. On 18 March 2010 10:24, Robin Paulson wrote: > i've been offered contours for new zealand under a cc license. the > precision is 20m, which i believe is higher than that of the srtm > data. > > how would i go about getting these into osm? from what i can tell, > contours are generally handled differently to other data > > ___ > talk mailing list > talk@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk > ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] offer of 20m contour data
On 17/03/10 21:24, Robin Paulson wrote: > i've been offered contours for new zealand under a cc license. the > precision is 20m, which i believe is higher than that of the srtm > data. > > how would i go about getting these into osm? from what i can tell, > contours are generally handled differently to other data What do you mean by getting them into osm exactly? You're quite right that we don't store this sort of elevation data in the main database but it sounds like you think we have sort of parallel database of elevation data - we don't. Most people wanting elevation data just use the SRTM dataset directly. Tom -- Tom Hughes (t...@compton.nu) http://compton.nu/ ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
