[gdal-dev] VRT File Support Within a Zstd-Compressed Zip

[Jordan Dauble]

Greetings, I am new to the GDAL discussion board and am just checking if this is the appropriate method for requesting a feature, such as VRT file support within a Zstd-compressed zip?


Jordan Dauble

SimBlocks LLC, Founder & CEO

407-641-5218

253 Plaza Dr., Ste C
Oviedo, FL 32765

https://www.simblocks.io/

Chair, SISO CIGI PSG<https://www.sisostandards.org/>

________________________________
From: Jordan Dauble <Jordan.Dauble at SimBlocks.io>
Sent: Sunday, July 19, 2026 5:17 PM
To: gdal-dev at lists.osgeo.org <gdal-dev at lists.osgeo.org>
Subject: VRT File Support Within a Zstd-Compressed Zip

Good afternoon, I would like to request that a new feature be added to GDAL. Our team has found that while both libzip and GDAL support Zstd compression, the support does not extend to loading vrt files within a Zstd-compressed zip. We have a use case where the vsizip file handler is used on a Zstd-compressed zip, such as
ogr2ogr outputTest.gpkg /vsizip/{<zip_filename>}/extent.geojson.

We believe the following files would require modification to support this feature:
port/cpl_minizip_unzip.cpp
port/cpl_vsil_gzip.cpp



Jordan Dauble

SimBlocks LLC, Founder & CEO

407-641-5218

253 Plaza Dr., Ste C
Oviedo, FL 32765

https://www.simblocks.io/

Chair, SISO CIGI PSG<https://www.sisostandards.org/>
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