<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div><div><font face="arial, helvetica, sans-serif">Hey,</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">My northing numbers are way off, so I must be doing something wrong.</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">I want to convert lat/long to the following coordinate system:</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">PROJCS["NAD_1983_StatePlane_New_Hampshire_FIPS_2800_Feet",</font></div><div><font face="arial, helvetica, sans-serif">GEOGCS["GCS_North_American_1983",</font></div><div><font face="arial, helvetica, sans-serif">DATUM["D_North_American_1983",</font></div><div><font face="arial, helvetica,
sans-serif">SPHEROID["GRS_1980", 6378137.0, 298.257222101]],</font></div><div><font face="arial, helvetica, sans-serif">PRIMEM["Greenwich",0.0],</font></div><div><font face="arial, helvetica, sans-serif">UNIT["Degree",0.0174532925199433]],</font></div><div><font face="arial, helvetica, sans-serif">PROJECTION["Transverse_Mercator"],</font></div><div><font face="arial, helvetica, sans-serif">PARAMETER["False_Easting",984250.0],</font></div><div><font face="arial, helvetica, sans-serif">PARAMETER["False_Northing",0.0],</font></div><div><font face="arial, helvetica, sans-serif">PARAMETER["Central_Meridian",-71.66666666666667],</font></div><div><font face="arial, helvetica, sans-serif">PARAMETER["Scale_Factor",0.9999666666666667],</font></div><div><font face="arial, helvetica, sans-serif">PARAMETER["Latitude_Of_Origin",42.5],</font></div><div><font face="arial, helvetica, sans-serif">UNIT["Foot_US",0.3048006096012192]]</font></div><div><font face="arial,
helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">I am initializing proj as follows:</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">proj +proj=tmerc +lat_0=42.5 +lon_0=-71.66666666666667 +k=0.9999666666666667 +x_0=984250.0 +y_0=0 +Units=Foot_US</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">I have a spot in SE New Hampshire, along the southern border with Massachusetts, close to the SE corner:</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">-71.32228851666666 42.69722980277778</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">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).</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">From a shape file that I got from New Hampshire, the bounding box is as follows:</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">745473.8751627404, 72029.90624999696, 1242053.0000937672, 1023283.999999998</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">(The coordinate system info above is from the prj file.)</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">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).</font></div><div><font
face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">My easting numbers are closer but not right on.</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">(I am using proj rel. 4.7.1, 23 September 2009, which came with ubuntu 12.04.)</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">If someone can see what I am doing wrong, I would appreciate some guidance.</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Thanks,</font></div><div><font face="arial, helvetica, sans-serif"><br></font></div><div><font face="arial, helvetica, sans-serif">Rick Graves</font></div><div style="font-family: arial, helvetica, sans-serif; font-size: 12pt; "><br></div></div></div></body></html>