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Hello,<BR>
<BR>
I'm trying to understand the corner coordinates info of the following gdalinfo output:<BR>
<BR>
<I>Driver: GTiff/GeoTIFF</I><BR>
<I>Files: mosaicoRe.tif</I><BR>
<I>Size is 2674, 2649</I><BR>
<I>Coordinate System is:</I><BR>
<I>PROJCS["unnamed",</I><BR>
<I> GEOGCS["WGS 84",</I><BR>
<I> DATUM["WGS_1984",</I><BR>
<I> SPHEROID["WGS 84",6378137,298.257223563,</I><BR>
<I> AUTHORITY["EPSG","7030"]],</I><BR>
<I> AUTHORITY["EPSG","6326"]],</I><BR>
<I> PRIMEM["Greenwich",0],</I><BR>
<I> UNIT["degree",0.0174532925199433],</I><BR>
<I> AUTHORITY["EPSG","4326"]],</I><BR>
<I> PROJECTION["Azimuthal_Equidistant"],</I><BR>
<I> PARAMETER["latitude_of_center",-6.2500000000005],</I><BR>
<I> PARAMETER["longitude_of_center",36.5166666666677],</I><BR>
<I> PARAMETER["false_easting",0],</I><BR>
<I> PARAMETER["false_northing",0],</I><BR>
<I> UNIT["metre",1,</I><BR>
<I> AUTHORITY["EPSG","9001"]]]</I><BR>
<I>Origin = (-4195457.111657013185322,5006607.738502652384341)</I><BR>
<I>Pixel Size = (14.156374416158000,-14.156374416158000)</I><BR>
<I>Metadata:</I><BR>
<I> AREA_OR_POINT=Area</I><BR>
<I>Image Structure Metadata:</I><BR>
<I> INTERLEAVE=PIXEL</I><BR>
<I>Corner Coordinates:</I><BR>
<I>Upper Left (-4195457.112, 5006607.739) ( 6d32'32.13"W, 36d42'16.93"N)</I><BR>
<I>Lower Left (-4195457.112, 4969107.503) ( 6d25'25.65"W, 36d24'11.72"N)</I><BR>
<I>Upper Right (-4157602.966, 5006607.739) ( 6d 9'42.57"W, 36d44'40.08"N)</I><BR>
<I>Lower Right (-4157602.966, 4969107.503) ( 6d 2'38.96"W, 36d26'32.65"N)</I><BR>
<I>Center (-4176530.039, 4987857.621) ( 6d17'34.10"W, 36d34'25.64"N)</I><BR>
<I>Band 1 Block=2674x1 Type=Byte, ColorInterp=Red</I><BR>
<I>Band 2 Block=2674x1 Type=Byte, ColorInterp=Green</I><BR>
<I>Band 3 Block=2674x1 Type=Byte, ColorInterp=Blue</I><BR>
<BR>
<BR>
<BR>
I'm focusing in the Upper Left info:
<UL>
<LI>The first pair of numbers are the coordinates of the upper left corner in the spatial reference set ot an azimuthal equidistant projection.
<LI>The second pair is the long-lat of the same upper left corner.
</UL>
<BR>
If I use the <A HREF="http://"> equations of the azimuthal equidistant projection</A> 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.<BR>
<BR>
Best regards<BR>
<BR>
<BR>
<BR>
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