I have a geotiff image which outputs with gdalinfo the following information: (The geotiff has been obtained originally from an HDF4 format)<br><br><span style="font-weight: bold;">rasdaman@mattia-desktop:/opt/rasdaman/local$ gdalinfo
Area1.tif<br>Driver: GTiff/GeoTIFF<br>Size is 7103, 3947<br>Coordinate System is:<br>PROJCS["HDFLook: LINEAR",<br> GEOGCS["unnamed",<br> DATUM["unknown",<br> SPHEROID["unnamed",6370997,0]],
<br> PRIMEM["Greenwich",0],<br> UNIT["degree",0.0174532925199433]],<br> PROJECTION["Equirectangular"],<br> PARAMETER["latitude_of_origin",0],<br> PARAMETER["central_meridian",0],
<br> PARAMETER["false_easting",0],<br> PARAMETER["false_northing",0],<br> UNIT["metre",1,<br> AUTHORITY["EPSG","9001"]]]<br>Origin = (8912408.472916,7090227.412053
)<br>Pixel Size = (694.49452741,-1000.15538912)<br>Corner Coordinates:<br>Upper Left ( 8912408.473, 7090227.412) ( 80d 9'4.51"E, 63d45'50.32"N)<br>Lower Left ( 8912408.473, 3142614.091) ( 80d 9'4.51
"E, 28d15'43.99"N)<br>Upper Right (13845403.101, 7090227.412) (124d30'53.14"E, 63d45'50.32"N)<br>Lower Right (13845403.101, 3142614.091) (124d30'53.14"E, 28d15'43.99"N)<br>
Center (11378905.787, 5116420.752) (102d19'58.82"E, 46d 0'47.16"N)<br>Band 1 Block=7103x20 Type=Byte, ColorInterp=Red<br>Band 2 Block=7103x20 Type=Byte, ColorInterp=Green<br>Band 3 Block=7103x20 Type=Byte, ColorInterp=Blue
<br><br><span style="font-weight: bold;"><br></span></span>Is my interpretation correct? The pixel resolution as indicated is in meters... Accordingly 694 meters horizontally (X res) , 1000 meters vertically (Y res)?!?!<br>
<br>What is the minus sign i front of the Y res for??? <br><br>What is the <span style="font-weight: bold;">UNIT["degree",0.0174532925199433]],</span> factor in this output?? can I use it to define the resolution?? Or what is it needed for??
<br><br>Final question, <br><br>Is there a stright forward way of changing the image's resolution so as to have a quadratic one whereby resX=resY ????<br><br>Any suggestions? help?<br><br>Thanks in advance<br clear="all">
<span style="font-weight: bold;"><span style="font-weight: bold;"></span></span><br>-- <br>Mattia