Add C/C++/Python API for raster band algebra:
arithmetic operators, comparison operators, AsType(),
gdal::abs()/sqrt()/log10()/log()/min()/max()/mean()/IfThenElse() functions
Add MiraMon raster driver: read-only support (#12293)
ADBC driver: support for ADBC BigQuery driver (requires BigQuery ADBC driver)
JSONFG driver: add read/write support for curve and measured geometries;
update to 0.3.0 spec
Parquet: add update support using OGREditableLayer mechanism
Add C++ public header files for raster functionality
Security: avoid potential path traversal in several drivers
Various code linting, static code analyzer fixes, etc.
Significant automation of the release process
Add Docker attestation (#13066)
Bump of shared lib major version
Detailed release notes
At https://github.com/OSGeo/gdal/blob/v3.12.0/NEWS.md