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I am trying to convert 1400 tiff files to GeoJson..tif file size ranges from 20 mb to 1Gb. gdal_polygonize.py is taking 24 hours for Big files 5 hours for small files.

Any way to improve performance?

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  • What is your GDAL version? Check with gdalinfo --version.
    – user30184
    Commented Dec 7, 2020 at 6:26
  • GDAL 3.0.2..i am on Linux
    – vishal
    Commented Dec 7, 2020 at 12:45
  • Some work was done for improving the building of complex polygons in github.com/OSGeo/gdal/pull/2908. That deals directly with gdal_dem but if could be worth trying if GDAL 3.2 is faster also with gdal_polygonize.
    – user30184
    Commented Dec 7, 2020 at 13:12

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Someone suggested using PostGIS tools raster2pgsql and ST_DumpAsPolygons in response to my question, saying that it is very fast (but seems to have deletet the comment later). For Footprints there is now gdal_footprint

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