[gdal-dev] cropping a tif with lat/lon

spalt danf at nac.net
Wed Apr 20 16:11:14 EDT 2011


Hi there!

Please forgive this terribly newbie question.  Been searching all day and I
just don't get it.

I have a geotiff VFR image from the FAA with the following coordinates as
reported by gdalinfo:

Upper Left  ( -143411.876,   94058.326) ( 78d44'4.05"W, 39d49'53.24"N)
Lower Left  ( -143411.876,  -93607.521) ( 78d41'40.46"W, 38d 7'55.46"N)
Upper Right (  111698.876,   94058.326) ( 75d44'16.70"W, 39d50'10.29"N)
Lower Right (  111698.876,  -93607.521) ( 75d46'8.55"W, 38d 8'12.11"N)
Center      (  -15856.500,     225.403) ( 77d14'2.52"W, 38d59'36.84"N)

I would like to crop the file as follows:
West_Bounding_Coordinate: -78.734457
East_Bounding_Coordinate: -75.737971
North_Bounding_Coordinate: 39.843493
South_Bounding_Coordinate: 38.132073

I guess the problem is I need to convert the -78.734457 into paramaters for
gdal_translate, but when I run this it gives an error:

gdal_translate -projwin -78.734457 39.843493 -75.737971 38.132073 in.tif
out.tif

What am I missing?  Thanks!!

-Dan

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