On Wed, 2009-11-18 at 18:50 -0500, Greg Troxel wrote: > Dave Hansen <d...@sr71.net> writes: > > > I updated my whole-US map for Garmin devices. It's stolen from the > > Cloudmade state gmapsupp images that you can find here: > > > > http://downloads.cloudmade.com/north_america/united_states/ > > > > and pieced together with mkgmap and wget. Just take the gmapsupp.img > > file from here: > > > > http://daveh.dev.openstreetmap.org/garmin/ > > > > and put in the /garmin/ directory on your device (if you have an SD card > > unit). I'll be updating these periodically as I feel the need. I think > > I also have my methods down to a point where I could just script it and > > make these weekly or something, if anyone is interested. > > I have wondered about making all-us garmin data, and think there might > be problems with the gmapsupp.img you made. Perhaps I'm confused, but > I'm throwing these points out for discussion: > > --route is AFAIK not turned on in cloudmade, so those maps wouldn't be > routable. If cloudmade has enabled routing, that would be good to > know. (Plus there's the noname roads being big and red.)
Yeah, the second batch I posted from Lambertus should be routable. I tried at least going a few miles down the road from my house, and it seemed to work OK. > roads are disconnected at state boundaries due to being cut with a > non-splitter tool. (splitter has special logic to insert nodes on > ways at tile boundaries.) I think I had this problem when using > e.g. massachusetts.osm.bz2 and vermont.osm.bz2 together into splitter > - driving from central mass to vermont had routes reverting to basemap > but when I crosssed into VT they became sensible. > > When making maps of a state, splitter makes tiles that fit the x/y > bbox, and these will in general go beyond the state border. When you > do this with neighboring states, typically you'll get overlapping > tiles that will have data in the state and no data out of state, > mirror image. It's not clear what the draw order is for areas covered > by both tiles, but any particular order can't be right. Yeah, that's true. But, take a look at the new set from Lambertus. He does it with non-overlapping (generally) bounding boxes. I'm not sure the second set I posted have this issue. > To make a gmapsupp.img for all of the US, I was going to get a US > extract of the planet, use splitter, and then use mkgmap with routing > enabled. I would then use gmapibuilder to put into RoadTrip so I can > load the parts I want together with the proprietary map (for when I > actually have to get somewhere :-(). That should address all three > issues above. Cool! Please do share when you get this done, it would be awesome. -- Dave _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us
