[GRASS-user] Identifying Projection/Datum From Coordinates

[Johannes Radinger]

Am 20.05.2011 um 17:38 schrieb Rich Shepard:

>  I'd appreciate advice from folks here on a question of coordinates and
> projections.
> 
>  I have been given a list of site coordinates such as these:
> easting: 371801.756688, northing: 427253.142826 located in northeastern
> Nevada. Because they are each 6 digits (left of the decimal point) I assume
> that they are in State Plane Coordinates for eastern Nevada (zone 4601) and
> I want to convert them to UTM (zone 11).

Hello I just checked here: http://www.earthpoint.us/StatePlane.aspx
and it seems that the zones for Nevada are 27XX (4601 is Washington)..
..maybe that helps.

/Johannes

> 
>  Using the NGS/NOAA SPC to GeoCoords converter results in latitudes of
> either 50 degrees N (for NAD83 in meters) or 47.5 degrees N (for NAD27 in
> feet), both of which are well off. I live about 45.5 degrees N and am well
> north of the area of interest.
> 
>  Please suggest how I can identify the projection and datum for these
> points so I can use proj4 to re-project them.
> 
> TIA,
> 
> Rich
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