Am 25.10.2014 um 07:05 schrieb Artur Bercik:
On Sat, Oct 25, 2014 at 2:00 PM, Andre Joost <[email protected]>
wrote:
Am 25.10.2014 um 06:03 schrieb Artur Bercik:
Dear GDAL users
I have a raster image of 406 lines and 270 samples with 5km pixel size.
The
center coordinates (lats and lons in degrees in GCS) of upper left pixel,
and the center coordinates (lats and lons in degrees in GCS) of the lower
right pixel are given, how can I calculate the coordinates of upper left
corner (ulx and uly) and the coordinates of lower right corner (lrx and
lry)?
You need to know the projection definition to calculate from distance in
pixel or km to degrees.
yes the projection are in GCS with WGS84 datum
GCS has units of degrees, not kilometers. Your image is 2030x1350 km,
but you have to know if it is Mercator, Transverse Mercator, Lambert
Coformal Conical, Stereographic, Albers Equal Area, Sinusoidal or
whatever. And you have to know the origin of the projection, like
Central meridian of UTM projections. And if North is upwards or not.
Greetings,
André Joost
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