[PROJ] PROJ 9.9.0RC1 and PROJ-data 1.25RC1
Kristian Evers
kristian at evers.dev
Tue Sep 8 04:34:28 PDT 2026
All,
In preparation for a new round of PROJ and PROJ-data release I have uploaded release candidates for both packages.
Download the archives here:
https://download.osgeo.org/proj/proj-9.9.0RC1.tar.gz
https://download.osgeo.org/proj/proj-9.9.0RC1.zip
https://download.osgeo.org/proj/proj-data-1.25RC1.tar.gz
https://download.osgeo.org/proj/proj-data-1.25RC1.zip
The PROJ release includes both updates and bug fixes. See the release notes below.
The PROJ-data release comes with the following additions:
* Grids for Greenlandic vertical CRSs GLLAT(2025) and GLMSL(2025)
* Norwegian grid for converting ETRS89 ellipsoidal heights to NN2000:2025 heights
Please test the release candidates and report any issues you may find with them.
Either here on the mailing list or on GitHub.
/Kristian
———————————————
# PROJ Release Notes
## 9.9.0
### Updates
#### Operations
* `tinshift`: support TIN GeoPackage files (#4603)
* Optimize `+step +proj=helmert +inv +x=X +y=Y +z=Z +step +proj=helmert +inv +x=-X +y=-Y +z=-Z` as `+proj=noop` (#4775)
* Optimization: replace iterative Aitoff inverse with closed-form inverse (#4796)
* Adds implementation of Transverse Mercator Zoned Grid System (supporting EPSG:32600 and EPSG:32700) (#4805)
* Add seismic bin grid operation methods (EPSG:9666 and EPSG:1049) (#4807)
* IVEA: DSEA projection onto icosahedron net (#4817)
#### API
* Add `proj_create_linear_3D_affine_parametric_conversion()` (#4682)
* Optimize `fwd_prepare()` (#4712)
* Add support for `DerivedProjectedCRS` registration (#4727)
* C++ API: CartesianCS::create(): by default check that all axis have the same unit (#4728)
* `createOperations()`: tune `geod_crs_of_datum_ensemble` <--> `geod_crs_of_another_datum` (#4773)
* add `proj_crs_is_dynamic()`, and `cs2cs`: warn when source/destination CRS is dynamic, but no epoch is provided (#4792)
* `createOperations()`: add heuristics to make BD72 + Ostend height to Amersfoort + NAP height lead to optimal result again (#4821)
* Make sure that WKT2 export of CRS imported from PROJ.4 strings or WKT1 is identical (#4844)
#### CMake
* Only add CPack related options when PROJ is the top level project. (#4722)
* Increase CMake minimum version from 3.16 to 3.22.1 (#4824)
* Replace PROJ_DATA_PATH with ${CMAKE_INSTALL_DATADIR}/proj (#4843)
* Define `target_compile_features` with C/C++ standards (#4847)
#### Database
* Database: update to EPSG v13.102 (#4829)
### Bug Fixes
* Refactor time parsing with thread-safe localtime and leap year fix (#4692)
* Make sure `projinfo --crs-extent-use none` works as expected (#4699)
* Fix SQLite3 version check so it is done by `find_package` (#4753)
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