[OSM-talk] USGS Topo maps

[David Fawcett]

The 24K topos may have better locational accuracy, but GNIS likely has
better temporal accuracy.  Some of the topos have not been updated in
~50 years.

David.

On Mon, Nov 28, 2011 at 10:54 AM, Greg Troxel <gdt at ir.bbn.com> wrote:
>
> Richard Weait <richard at weait.com> writes:
>
>> On Mon, Nov 28, 2011 at 8:44 AM, Ian <ian.dees at gmail.com> wrote:
>>> FYI: Most of the information present on USGS Topo Maps should already be
>>> present on the map due to an import of the GNIS dataset a couple years ago.
>>
>> And fixing that import so that the GNIS points are better aligned by
>> your local knowledge is very welcome!
>
> Agreed - most of the GNIS points need more position accuracy.
>
> But, USGS Topos != GNIS.  On the USGS topos I have, the POIs such as
> churches, cemeteries, schools, libraries, etc. are positioned very
> accurately.  GNIS is clearly a different dataset.
>
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