[PROJ] PROJ 9.6.0RC1 & PROJ-data 1.21RC1

[Kristian Evers]

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-9.6.0RC1.tar.gz
https://download.osgeo.org/proj/proj-9.6.0RC1.zip

https://download.osgeo.org/proj/proj-data-1.21RC1.tar.gz
https://download.osgeo.org/proj/proj-data-1.21RC1.zip

The PROJ release includes various updates and bug fixes. See the release notes below.

The PROJ-data package adds

* Finish geoid models
* French grid fr_ign_RGM04versRGM23.tif for RGM04 -> RGM23 datum shift (Mayotte)
* Latvian LGIA geoid grid

Please test the release candidates and report any issues you may find with them.
Either here on the mailing list or on GitHub.

/Kristian

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# PROJ Release Notes

## 9.6.0

### Updates

* `projinfo`: display whether an operation is time-dependent (#4255)

* Add CMake options `EMBED_RESOURCE_FILES` and `USE_ONLY_EMBEDDED_RESOURCE_FILES` for `proj.db` and `proj.ini` embedding (#4265, #4274)

* Database: ingest deprecated ESRI names to be able to better import old WKT ESRI (#4282)

* `proj_factors()`: enhance speed when called repeatedly on same compound or projected CRS (#4289)

* Add Airocean projection (formerly Dymaxion) (#4303)

* `createOperations()`: Optimization by avoiding database lookups for CRS (typically PROJ strings) using unknown datums (#4320)

* PROJJSON export: for a Projected CRS, add an explicit type=GeographicCRS/GeodeticCRS members to the base_crs member (#4331)

* `proj_trans_bounds()`: make it work when target CRS is a CompoundCRS (#4333)

* `createOperations()`: do Helmert transformation in 2D when one of source or target CRS is compound (#4337)

* Map EPSG method 'Vertical Offset by Grid Interpolation (asc)' to +proj=vgridshift (#4344)

* Add support for 'Coordinate Frame rotation full matrix (geocen)' and Coordinate Frame rotation full matrix (geog2D)' methods (#4348)

* Add a CMake `EMBED_RESOURCE_DIRECTORY` option to embed .tif/.json files in to libproj (#4349, #4373)

* Take into account new EPSG methods 'Cartesian Grid Offsets by TIN Interpolation (JSON)' and 'Vertical Offset by TIN Interpolation (JSON)' (#4353)

* Added an option `native_ca` to `proj.ini` and an environment variable `PROJ_NATIVE_CA` to be able to configure curl to use the operating system CA store. (#4356)

* Database: add an optional step_direction column to the concatenated_operation_step table (#4357)

* Database: replicate EGM2008 grid transformation record to WGS 84 realizations (#4363)

* Improve ETRFxxx to ETRFyyy, and WGS 84 (xxx) to WGS 84 (yyy) (#4364)

* Build: Update to C++17 version (#4366, #4369)

* Add bash completion script for projinfo (#4371)

* Dispatch content of `4D_api.cpp` into multiple .cpp files (#4393)

* Add `proj_trans_bounds_3D()` (#4394)

* Database: add a engineering_datum and engineering_crs tables; import few related EPSG records (#4396)

* NKG transformations: Add support for EUREF-FIN in Finish transformations (#4399)

* Add Spilhaus projection (#4401)

* Export ESRI:54099 `WGS_1984_Spilhaus_Ocean_Map_in_Square` as PROJ string (#4402)

* Database: update to EPSG v12.004 (#4413)

* `proj_download_file()`: invalidate in-memory caches related to downloaded file (for the current context) (#4414)


### Bug Fixes

* `createObjectsFromName()`: be more tolerant about N/S vs North/South, absence of zone or height (#4318)

* `createFromPROJString`: avoid repeated openings of proj.db and proj.ini and lookup of 'epsg' (#4334)

* Debugging/internals: append sub-grid index to grid name when opening a multi-grid TIFF file (#4381)

* `createOperations()`: use more appropriate operation when using a 'PROJ {grid_name}' geoid model, based on matching the vertical datum (#4379)

* `proj_clone()`: properly propagate `errorIfBestTransformationNotAvailable` and other flags from source object (#4382)

* Inverse +proj=cass: fix non-convergence on inputs where easting=false_easting or northing=false_northing (#4386)

* Fix typo in parameter for ITRF97 in ITRF2014 file (#4408)