> When I attempt to call it, using the following, the `vsimem` object seems > to no longer be accessible to perform the overview creation:
Yes, /vsimem/ objects are only visible during the lifetime of the process. Here as you start a subprocss, the /vsimem file will not be visible by the parent Different possible solutions: - you materialize the file on the filesystem - or you import gdal_merge, and run gdal_merge.main(argv) - or you use gdal.Warp() instead of gdal_merge -- Spatialys - Geospatial professional services http://www.spatialys.com _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev