(note: I'm talking about boundaries that have stayed in the same place during recent times, not those that change every year by annexations.) While the TIGER data is pretty good for these boundaries, it has some precision issues. For example, at http://www.openstreetmap.org/?lat=40.81072&lon=-74.06072&zoom=16&layers=B000FTF the line is shown following Paterson Plank Road over the Turnpike, while USGS places it on the former pre-Turnpike alignment of the road: http://mapper.acme.com/?ll=40.80869,-74.06204&z=16&t=T Other (probably unusable) sources such as http://gis.co.bergen.nj.us/appbase/ and http://www.state.nj.us/transportation/gis/maps/bergen.pdf agree with USGS.
So the question is: for boundaries that have not changed since the USGS topos were created, can it be assumed that they will be more precise than the TIGER data? Are there any other usable sources that will be more precise than TIGER? _______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-us