[Proj] NGS Control Points

Eric Miller EMiller at dfg.ca.gov
Thu Jun 23 09:45:57 EST 2011

>>> On 6/22/2011 at 7:14 PM, Richard Greenwood <richard.greenwood at gmail.com>
> Following up on my original reply to the original question - I
> attempted to transform the point from NAD83 to NAD27 with NADCON
> (actually I used CORPSCON) and it refused to process the
> transformation because it was outside the conus grid shift files,
> which are the only datum shift files that I have.

That's interesting. The transform seems to work fine with the online NADCON tool.  And, considering that the position is on land in the city of San Francisco it should!

I know it's the "left coast" and all, but the position isn't even as far west as Cape Mendocino -- which is the farthest west point in California at roughly -124.41 longitude.

http://en.wikipedia.org/wiki/Cape_Mendocino (Geologically interesting and beautiful!)

Eric G. Miller
Staff Programmer
CA Dept. of Fish & Game

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