[Proj] request help with proj
EMiller at dfg.ca.gov
Thu Aug 2 10:44:37 EST 2012
See, proj -lu
Eric G. Miller
Natural Resources Management Applications
California Department of Fish and Game
>>> On 8/2/2012 at 6:44 AM, Rick Graves <gravesricharde at yahoo.com> wrote:
> My northing numbers are way off, so I must be doing something wrong.
> I want to convert lat/long to the following coordinate system:
> SPHEROID["GRS_1980", 6378137.0, 298.257222101]],
> I am initializing proj as follows:
> proj +proj=tmerc +lat_0=42.5 +lon_0=-71.66666666666667 +k=0.9999666666666667
> +x_0=984250.0 +y_0=0 +Units=Foot_US
> I have a spot in SE New Hampshire, along the southern border with
> Massachusetts, close to the SE corner:
> -71.32228851666666 42.69722980277778
> If you give 42.69722980277778, -71.32228851666666 to http://maps.google.com/,
> it will show you a spot in New Hampshire (but gives a closest address in
> Massachusetts just across the border, no big deal).
> From a shape file that I got from New Hampshire, the bounding box is as
> 745473.8751627404, 72029.90624999696, 1242053.0000937672, 1023283.999999998
> (The coordinate system info above is from the prj file.)
> So for a spot near the southern border, I am expecting a northing close to
> 72030 (72,030), but I am getting 21966.03 (21,966).
> My easting numbers are closer but not right on.
> (I am using proj rel. 4.7.1, 23 September 2009, which came with ubuntu
> If someone can see what I am doing wrong, I would appreciate some guidance.
> Rick Graves
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