[gdal-dev] gdalwarp into an existing destination from python

[Olivier Dalang]

Dear list,

When I use gdalwarp from command line and set output to an existing file,
the contents get mosaic-ed in the existing file (as expected and
documented).

$> gdalwarp -cutline cutline.shp source.tif dest.tif

But when doing the from python, the existing destination file get
overwritten.

gdal.Warp("dest.tif", "source.tif", cutlineDSName="cutline.shp")

Is there a flag or something to achieve same behaviour as command line ? I
looked carefully in the python api doc, but couldn't find it...

Cheers !!

Olivier
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