On 18 Feb 2010, at 2:27 , Sam Vekemans wrote: > > I use mainly Roadtrip and all is scripted without install. If I absolutely > need Mapsource then Mapset toolkit is sufficient and not much more > complicated than starting an installer. I think mkgmap has also an option to > create a a control file for a Mapsource installer with some 3rd party package > tool. But once you mess up Mapsource Mapset Toolkit is a must have to clean > broken registry. > > Thats what happens to me. thanks for explaining it :) > The srtm groundtruth contours can easily be installed using mapsettoolkit, > so i make the img files available. > and I should have said that contours as overlay are not very useful in Roadtrip/Mapsource only gps units show them as overlay. I have used it only to debug. and I use mkgmap to compile the gmapsup.img. this is much faster than the export from Roadtrip/Mapsource
> > > Im manually making 10m contours for all of Canada (it will be a 2 gig > > install when done) maybe someone wants to make on for all of USA? > > have used this combination for a compromise of speed/size/precision. as said > srtm data isn't that good and 10m seemed overkill. with NED data it's a > different story > 25m minor > 100m medium > 200m major > > In canada we have access to Natural resources canada contour data that is > available as 20m contours. > Its the same contours that ibycus topo made. > http://www.ibycus.com/ibycustopo/ > > So its really relative... if you hiking then 10m contours is great... and > same if mountain biking. .. but if your road biking, then it might be a > little much. > > So i can make a separate map for the 25 meter contours > yes this is really user dependent and many in US will even prefer it in feet. that's why I have everything scripted and can easily rebuild with different parameters. groundtruth didn't work at all for me and have used gdal_translate, gdal_contour, shape-to-osmm, mkgmap with some perl wrapper code. didn't add the download from ftp feature because have all SRTM on disc. > > what did you use for medium and major contours? > > I just used the default that groundtruth gives. > 1000 major > 20 interm > 10 minor. > > Also, since the file is so big (3 gigs) it should be torrented, as well as > distributed the same way Ubuntu is, by manually giving a DVD of it. or > snailmail a an empty sd card, and i can but it on the card and mail it back. > Thats how the Ibycus topo is descributed in Canada. > yes torrent is a perfect protocol for such data > Also, > http://touren.mospace.de/kachel.html > looks like a handy service. > I dont know who the author is it is, but it would be great to have the planet > pre-done of 1 degree x 1 Degree contours. ... maybe 25m would be sufficient > for most users. That way anyone can just create a mapsource map of whatever > size they want. > > Im fine with the quality of the SRTM contours (since there isnt anything else > (that i know how to work with) that is better. :) srtm is really bad in mountain areas where you care most. US has NED data and I plan to switch to that, for selected mountain regions worldwide best data is available at http://www.viewfinderpanoramas.org/dem3.html Aster is supposed to be better than SRTM but license is not as open as SRTM. also http://srtm.csi.cgiar.org/ is SRTM based with refined data. > > Cheers, > Sam > > > > > > Sam > > > > On 2/17/10, Apollinaris Schoell <ascho...@gmail.com> wrote: > >> have built contour line maps lately based on srtm data. If anyone is > >> interested in a specifc area let me know. I am not such a web guru like > >> Lambertus and have no host to provide them for convenient download. If > >> someone can host them let me know. most tiles are 1x1 degree except where > >> it didn't fit in one .img > >> But srtm data has many errors and gaps in mountain areas. Anyone knows > >> where > >> to get NED data for large areas? The seamless server is such a pain and it > >> will take forever just for a single state. > >> or we could start a crowd source effort to download and share them. > >> > >> > >> > >> > >> On 17 Feb 2010, at 15:00 , Dave Hansen wrote: > >> > >>> On Wed, 2010-02-17 at 16:05 -0500, Mike N. wrote: > >>>> Many thanks for this update - it has come in handy many times since the > >>>> last > >>>> update. I was about to check with you to see if there was any way to > >>>> update it, but you beat me to it! > >>> > >>> It's just about at the point where I can automate it to rebuild them > >>> whenever Lambertus kicks off an update himself. I'll let everyone know > >>> when I get this set up. > >>> > >>> -- Dave > >>> > >>> > >>> _______________________________________________ > >>> Talk-us mailing list > >>> Talk-us@openstreetmap.org > >>> http://lists.openstreetmap.org/listinfo/talk-us > >> > >> > >> _______________________________________________ > >> Talk-us mailing list > >> Talk-us@openstreetmap.org > >> http://lists.openstreetmap.org/listinfo/talk-us > >> > > > > > > -- > > Twitter: @Acrosscanada > > Blog: http://Acrosscanadatrails.blogspot.com > > Facebook: http://www.facebook.com/sam.vekemans > > Skype: samvekemans > > OpenStreetMap IRC: http://irc.openstreetmap.org > > @Acrosscanadatrails > > _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
