StupidGDALLocalFile

[markjessell]

Did you try https://gdal.org/user/virtual_file_systems.html#vsimem-in-memory-files

GDAL writing to and reading from virtual memory?

[RoyThomsonMonash]

I did use in memory files for netCDF based and http based heightmaps but for some reason I couldn't get WebCoverageService based heightmaps to load into memory. This is the only case it is necessary.

[lachlangrose]

I'm reoppening this issue because if the user doesn't have permission to write to the m2l_data_tmp/StupidGDALLocalFile.tif file then it will crash map2loop.

For me I get an error if I run the plot_hamersley example from a root directory. E.g. from the map2loop repo run python docs/examples/plot_hamersley.py' will return PermissionError: [Errno 13] Permission denied: 'm2l_data_tmp/StupidGDALLocalFile.tif'` but if I run from the docs/examples directory it will work.

Why not use the system tmp directory? https://docs.python.org/3/library/tempfile.html

[AngRodrigues]

Good idea, we're already using tempfile in some of the tests, e.g., https://github.com/Loop3D/map2loop/blob/master/tests/thickness/StructurePoint/test_thickness_StructuralPoint_local_source.py, and seems to be working well.