[Talk-us] dubious church node

Brian May bmay at mapwise.com
Sat Sep 30 13:59:38 UTC 2017


On 9/30/2017 3:19 AM, Mark Wagner wrote:
> Second, many entries have their coordinates specified using the old NAD
> 27 datum, but somewhere along the line, that fact was lost and the
> coordinates were assumed to be in either NAD 83 or WGS 84.  This
> results in an offset that increases the further you go from central
> Indiana; the offset in Alaska is upwards of a hundred meters to the
> west.
>
I found this [1] page that says:.

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9. What datum applies to the geographic coordinates in the GNIS Database?
All coordinates in the database are in NAD 83. They were converted from 
NAD 27 in September 2005.

----

And this page [2] which appears to be official metadata that doesn't 
mention a datum - but it was written in 1994 (see very bottom of page).

[1] https://geonames.usgs.gov/domestic/faqs.htm
[2] https://geonames.usgs.gov/metadata.html

Brian




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