[ACCEPTED]-GTiff mask with shapefile in python with gdal, ogr, etc-ogr

Accepted answer
Score: 14

This functionality is already incorporated 14 into the gdal command line utilities. Given 13 your case, i don't see any reason why you 12 want to do this yourself in Python.

You 11 can loop over the geomerties with OGR and 10 for each one call gdalwarp with the appropriate 9 parameters.

import ogr
import subprocess

inraster = 'NE1_HR_LC_SR_W_DR\NE1_HR_LC_SR_W_DR.tif'
inshape = '110m_cultural\ne_110m_admin_0_countries_lakes.shp'

ds = ogr.Open(inshape)
lyr = ds.GetLayer(0)

ft = lyr.GetNextFeature()

while ft:

    country_name = ft.GetFieldAsString('admin')

    outraster = inraster.replace('.tif', '_%s.tif' % country_name.replace(' ', '_'))    
    subprocess.call(['gdalwarp', inraster, outraster, '-cutline', inshape, 
                     '-crop_to_cutline', '-cwhere', "'admin'='%s'" % country_name])

    ft = lyr.GetNextFeature()

ds = None

I have used some example data 8 from Natural Earth in the example above, for 7 Brazil the cutout looks like:

enter image description here

If you only 6 want to crop the image to the area of the 5 polygon and dont mask anything outside you 4 can transform the Shapefile so it contains 3 the envelope of the polygons. Or simply 2 loose the shapefile and call gdal_translate with -projwin to specify 1 the area of interest.

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