[PROJ] PROJ 9.9.0RC1 and PROJ-data 1.25RC1

[Kristian Evers]

PSC Members,

No issues has been identified in either release candidate so I hereby motion that they are promoted to the final release. 

I'll start with my +1.

/Kristian


> On 8 Sep 2026, at 13.34, Kristian Evers via PROJ <proj at lists.osgeo.org> wrote:
> 
> 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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