tinshift: support TIN GeoPackage files

Such files are equivalent to already supported TIN JSON files, but scale
better for arbitrarily large triangulations, in particular for
network-based access.

The format is defined in source/specifications/tin_gpkg.rst and the
https://github.com/OSGeo/PROJ-data/blob/master/grid_tools/tin_json_to_gpkg_tin.py
Python script may be used o convert an existing TIN JSON into a TIN
GeoPackage.

Author: rouault

.github/workflows/windows.yml

@@ -55,7 +55,7 @@ jobs:
         shell: cmd
         if: steps.cache.outputs.cache-hit != 'true'
         run: |
-            vcpkg install sqlite3[core,tool] tiff curl --triplet=${{ env.ARCH }}-windows
+            vcpkg install sqlite3[core,tool,rtree] tiff curl --triplet=${{ env.ARCH }}-windows
 
       - name: Build
         shell: cmd

appveyor.yml

@@ -34,7 +34,7 @@ build_script:
       git fetch --depth=1 origin 2023.04.15 &
       (if "%APPVEYOR_BUILD_WORKER_IMAGE%"=="Visual Studio 2015" (git -c advice.detachedHead=false checkout FETCH_HEAD)) &
       .\bootstrap-vcpkg.bat -disableMetrics &
-      vcpkg install sqlite3[core,tool] tiff curl --triplet=%platform%-windows &
+      vcpkg install sqlite3[core,tool,rtree] tiff curl --triplet=%platform%-windows &
       cd %APPVEYOR_BUILD_FOLDER%
     )
   - dir %VCPKG_INSTALLED%\bin

data/CMakeLists.txt

@@ -31,7 +31,7 @@ set(ALL_SQL_IN "${CMAKE_CURRENT_BINARY_DIR}/all.sql.in")
 set(PROJ_DB "${CMAKE_CURRENT_BINARY_DIR}/proj.db")
 include(sql_filelist.cmake)
 
-set(PROJ_DB_SQL_EXPECTED_MD5 "740a1a99e9182f90233102e3745d3dfd")
+set(PROJ_DB_SQL_EXPECTED_MD5 "dc586d3a630e2db81c46ecbb5da93647")
 
 add_custom_command(
   OUTPUT ${PROJ_DB}

data/sql/grid_alternatives.sql

@@ -183,6 +183,9 @@ VALUES
 ('fi_nls_n43_n60.json','fi_nls_n43_n60.json',NULL,'JSON','tinshift',0,NULL,'https://cdn.proj.org/fi_nls_n43_n60.json',1,1,NULL),
 ('fi_nls_n60_n2000.json','fi_nls_n60_n2000.json',NULL,'JSON','tinshift',0,NULL,'https://cdn.proj.org/fi_nls_n60_n2000.json',1,1,NULL),
 ('fi_nls_ykj_etrs35fin.json','fi_nls_ykj_etrs35fin.json',NULL,'JSON','tinshift',0,NULL,'https://cdn.proj.org/fi_nls_ykj_etrs35fin.json',1,1,NULL),
+('NOT-YET-IN-GRID-TRANSFORMATION-fi_nls_n43_n60.gpkg','fi_nls_n43_n60.gpkg',NULL,'GPKG','tinshift',0,NULL,'https://cdn.proj.org/fi_nls_n43_n60.gpkg',1,1,NULL),
+('NOT-YET-IN-GRID-TRANSFORMATION-fi_nls_n60_n2000.gpkg','fi_nls_n60_n2000.gpkg',NULL,'GPKG','tinshift',0,NULL,'https://cdn.proj.org/fi_nls_n60_n2000.gpkg',1,1,NULL),
+('NOT-YET-IN-GRID-TRANSFORMATION-fi_nls_ykj_etrs35fin.gpkg','fi_nls_ykj_etrs35fin.gpkg',NULL,'GPKG','tinshift',0,NULL,'https://cdn.proj.org/fi_nls_ykj_etrs35fin.gpkg',1,1,NULL),
 
 -- fr_ign - IGN France
 ('rgf93_ntf.gsb','fr_ign_ntf_r93.tif','ntf_r93.gsb','GTiff','hgridshift',1,NULL,'https://cdn.proj.org/fr_ign_ntf_r93.tif',1,1,NULL),

data/sql/proj_db_table_defs.sql

@@ -896,7 +896,7 @@ CREATE TABLE grid_alternatives(
     original_grid_name TEXT NOT NULL PRIMARY KEY,   -- original grid name (e.g. Und_min2.5x2.5_egm2008_isw=82_WGS84_TideFree.gz). For LOS/LAS format, the .las files
     proj_grid_name TEXT NOT NULL,                   -- PROJ >= 7 grid name (e.g us_nga_egm08_25.tif)
     old_proj_grid_name TEXT,                        -- PROJ < 7 grid name (e.g egm08_25.gtx)
-    proj_grid_format TEXT NOT NULL,                 -- 'GTiff', 'GTX', 'NTv2', JSON
+    proj_grid_format TEXT NOT NULL,                 -- 'GTiff', 'GTX', 'NTv2', 'JSON', 'GPKG'
     proj_method TEXT NOT NULL,                      -- gridshift, hgridshift, vgridshift, geoid_like, geocentricoffset, tinshift or velocity_grid
     inverse_direction BOOLEAN NOT NULL CHECK (inverse_direction IN (0, 1)), -- whether the PROJ grid direction is reversed w.r.t to the authority one (TRUE in that case)
     package_name TEXT,                              -- no longer used. Must be NULL
@@ -906,14 +906,14 @@ CREATE TABLE grid_alternatives(
     directory TEXT,                                 -- optional directory where the file might be located
 
     CONSTRAINT fk_grid_alternatives_grid_packages FOREIGN KEY (package_name) REFERENCES grid_packages(package_name) ON DELETE CASCADE,
-    CONSTRAINT check_grid_alternatives_grid_fromat CHECK (proj_grid_format IN ('GTiff', 'GTX', 'NTv2', 'JSON')),
+    CONSTRAINT check_grid_alternatives_grid_fromat CHECK (proj_grid_format IN ('GTiff', 'GTX', 'NTv2', 'JSON', 'GPKG')),
     CONSTRAINT check_grid_alternatives_proj_method CHECK (proj_method IN ('gridshift', 'hgridshift', 'vgridshift', 'geoid_like', 'geocentricoffset', 'tinshift', 'velocity_grid', 'defmodel')),
     CONSTRAINT check_grid_alternatives_inverse_direction CHECK (NOT(proj_method = 'geoid_like' AND inverse_direction = 1)),
     CONSTRAINT check_grid_alternatives_package_name CHECK (package_name IS NULL),
     CONSTRAINT check_grid_alternatives_direct_download_url CHECK (NOT(direct_download IS NULL AND url IS NOT NULL)),
     CONSTRAINT check_grid_alternatives_open_license_url CHECK (NOT(open_license IS NULL AND url IS NOT NULL)),
     CONSTRAINT check_grid_alternatives_constraint_cdn CHECK (NOT(url LIKE 'https://cdn.proj.org/%' AND (direct_download = 0 OR open_license = 0 OR url != 'https://cdn.proj.org/' || proj_grid_name))),
-    CONSTRAINT check_grid_alternatives_tinshift CHECK ((proj_grid_format != 'JSON' AND proj_method != 'tinshift') OR (proj_grid_format = 'JSON' AND proj_method = 'tinshift'))
+    CONSTRAINT check_grid_alternatives_tinshift CHECK ((proj_grid_format NOT IN ('JSON','GPKG') AND proj_method != 'tinshift') OR (proj_grid_format IN ('JSON', 'GPKG') AND proj_method = 'tinshift'))
 ) WITHOUT ROWID;
 
 CREATE INDEX idx_grid_alternatives_proj_grid_name ON grid_alternatives(proj_grid_name);