Hi, Have a look at https://gis.stackexchange.com/questions/326773/importing-shapefile-from-website-if-download-link-is-compressed-file/326778
I tried what happens with command ogrinfo /vsizip/vsicurl/https://www2.census.gov/geo/tiger/GENZ2010/gz_2010_36_620_l2_500k.zip --debug on HTTP: libcurl/7.37.1 OpenSSL/1.0.1h zlib/1.2.3 VSICURL: GetFileSize(https://www2.census.gov/geo/tiger/GENZ2010/gz_2010_36_620_l2_500k.zip)=0 response_code=200 VSICURL: Request at offset 0, after end of file VSICURL: Request at offset 0, after end of file VSICURL: Request at offset 0, after end of file ... repeats about 130 times FAILURE: Unable to open datasource `/vsizip/vsicurl/https://www2.census.gov/geo/tiger/GENZ2010/gz_2010_36_620_l2_500k.zip' with the following drivers. Does this mean that www2.census.gov supports HEAD request but it does not send the file size header, or the value of file size is 0? Perhaps vsicurl could catch this and show a meaningful message? -Jukka Rahkonen-
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