On mardi 21 juillet 2020 18:52:10 CEST toku2288 via groups.io wrote:

> Hi, Just an update. Turns GeoTIFF does use GCJ encoding, However, There seem

> to be some open-source projects online which can reverse the transformation

> to high accuracy, Is there some way to use this algorithm to reproject the

> GeoTIFF file?

This had been discussed for PROJ in

https://github.com/OSGeo/PROJ/issues/982

Summary: apparently technically doable, but for legal reasons for folks operating in China, cannot be included in PROJ.

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