[Talk-us] Best sources for boundary lines?

[Apollinaris Schoell]

On Mon, Jun 14, 2010 at 1:55 PM, Nathan Edgars II <neroute2 at gmail.com>wrote:

> (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?
>
>
my experience is that TIGER is the worst. USGS also matches with natural
features fences, ... where this can be checked against Yahoo sat images.
 for better data you can try to get state/county data.
be careful to use USGS from terraserver. a couple of areas are shifted or
randomly stretched.



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