[gdal-dev] gdalwarp: mercator to lambert azimutal equeal area

jumpjack jumpjack at libero.it
Tue Feb 10 12:48:46 EST 2009

Thanks, but I can't yet understand...
I have a map of the whole world. It is 640 pixel wide. "Planar world" is 44.000.000 meters wide.... so which number should I specify as "A"??
The same applies for "E".
About C and F: which coordinates should I specify? Lat and Lon?  This would be 90,-180, I guess, being the map centered on Lat,Lon=0,0 and 360° wide and 180° tall.

Thanks for your pacience.

(Please reply on the list, others could be interested!)


*********** REPLY SEPARATOR  ***********

On 09/02/2009 at 13.47 Wendy Fay Stevenson wrote:

>As long as the world file is the same name as the input file to gdalwarp,
>it will work.
>As for specifying the world file:
>A: number of meters across / number of pixels across
>D & B: 0
>E: -1 * number of meters in length / number of pixels in length 
>C and F specify the center of the top left pixel in eastings and
>northings, i.e. where on the projection the first pixel corresponds to.

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