On 11-02-15 07:50 AM, Emilio de Torres Fernández wrote:
If I use the equations of the azimuthal equidistant projection <http://> to transform long=6d32'32.13"W and lat=36d42'16.93"N) I get x = -0.65688 and y = 0.78961, not (-4195457.112, 5006607.739). Why??? I guess I misunderstood some concept of the "Corner Coordinates" of gdalinfo.
Emilio, Well, I don't know what equations you are using, but I can't imagine getting x and y values in meters that small unless you were *right at* the origin which is not the case. Perhaps you don't understand the units required by, and/or produced by the equations you are applying? When I use PROJ.4 to do the reprojection (as GDAL does underneath) I get: cs2cs -I +proj=aeqd +lat_0=-6.2500000000005 +lon_0=36.5166666666677 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +to +proj=latlong +datum=WGS84 6d32'32.13"W 36d42'16.93"N -4196092.49 5007369.96 0.00 Make sure you aren't mixing up longitude and latitude. GDAL and PROJ.4 default to long/lat order while the location seems coincidentally near the origin of the projection *if* you reversed the ordinates. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Programmer for Rent _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
