On Thu, 2008-08-14 at 17:18 +0100, Andy Allan wrote: > Islands and purple state boundaries, I believe it is. So given that > both of them are auto-generated, one of the sources must have been > off. > > Cheers, > Andy > > On Thu, Aug 14, 2008 at 4:37 PM, Mikel Maron <[EMAIL PROTECTED]> wrote: > > any reason why the coastlines and not aligned with the island land areas in > > the Great Lakes? > > > > http://www.openstreetmap.org/?lat=46.989&lon=-90.777&zoom=11&layers=B00FTF > > > > -Mikel
If you turn on the data layer it shows that the rendered tiles match the underlying data in the OSM DB so it isn't an issue with the rendering. The coastlines appear to be consistent with the tiger import and the Yahoo imagery. It looks like the county data is at fault. It seems the county data came from: http://www-atlas.usgs.gov/mld/countyp.html It looks like the points in the DB match the shapefile. The data projection data they specify (NAD83/GRS80) seems to be an exact match for WGS84. The error seems to be a shift of around 500m. The FAQ for the county data has a section for data accuracy but the answer is blank. Jon _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
