I found some public domain data I want to upload to OSM, but can't seem to convert the NAD83 format it's in to latitude/longitude. I know it should be easy, but even things like:
http://www.ngs.noaa.gov/cgi-bin/spc_getgp.prl are giving me ridiculous answers. Here's the header from ogrinfo -al PROJCS["NAD_1983_HARN_StatePlane_New_Mexico_Central_FIPS_3002_Feet", GEOGCS["GCS_North_American_1983_HARN", DATUM["NAD83_High_Accuracy_Regional_Network", SPHEROID["GRS_1980",6378137.0,298.257222101]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",1640416.666666667], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",-106.25], PARAMETER["Scale_Factor",0.9999], PARAMETER["Latitude_Of_Origin",31.0], UNIT["Foot_US",0.3048006096012192]] and a sample item: OGRFeature(schoolLocation):23 SCHOOLTYPE (String) = HIGH SCHOOLNAME (String) = RIO GRANDE POINT (1507003.249 1473733.624) I know the correct answer for this item is approximately latitude 35.052536, longitude -106.69394, but am not sure how to do this translation for all items in the shapefile. I played around with subtracting (and even adding) the "False_Easting" value, converting feet to meters, using NAD27 (on the NOAA page above), but nothing seemed to work. Any help appreciated: I suspect it's just a linear transformation, but want to make sure I have it right before uploading. -- We're just a Bunch Of Regular Guys, a collective group that's trying to understand and assimilate technology. We feel that resistance to new ideas and technology is unwise and ultimately futile. _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/newbies
