PROJ/docs/source/operations/transformations, branch 8.2.1

Add fallback_strategy to tinshift transform

2021-10-21T20:18:29+00:00

 - this bumps format_version of tinshift JSON to 1.1 for the new field
   fallback_strategy
 - the default behaviour without that field is retained
 - if fallback_strategy is set to "nearest_side", then points that do not fall
   into any of the triangles will be transformed according to the nearest
   triangle
 - if fallback_centroid is set to "nearest_side", then points that do not fall
   into any of the triangles will be transformed according to the triangle
   with the nearest centroid

DOC: configure and add spelling wordlist; fix typos, apply Sphinx syntax (#2705)

2021-05-03T21:05:06+00:00

fix a few typos in the docs

2021-01-17T10:57:39+00:00

Add a +proj=tinshift for triangulation-based transformations

2020-09-30T09:26:48+00:00

Implements RFC-6

Doc: add alias in pages of transformation methods

2020-07-01T13:13:41+00:00

Docs: Use +grids and tif file for deformation examples

2020-06-02T10:27:29+00:00

Merge pull request #2206 from rouault/deformation_model_for_merge

2020-05-17T20:07:31+00:00

 Add a +proj=defmodel transformation for multi-component time-based deformation models

Add a +proj=defmodel transformation for multi-component time-based deformation models

2020-05-16T15:53:13+00:00

Fixes #1001

Co-authored-by: Chris Crook

scripts/fix_typos.sh: fix URLs to dictionaries, and fix typos spotted

2020-05-09T16:48:10+00:00

Merge RFC4 (#1865)

2020-01-22T17:31:26+00:00

This commit is the result of the squashing of rfc4_dev branch in a single
commit. It implements mostly RFC 4 related work.

* Grid handling:
  - remove obsolete and presumably unfinished implementation of grid catalog functionality
  - all grid functionality is in grids.cpp/.hpp
  - vertical and horizontal grid shift: rework to no longer load whole grid into memory
  - remove hgrids and vgrids member from PJ structure, and store them in hgridshift/vgridshift/deformation structures
  - build systems: add optional libtiff dependency. Must be explicitly disabled if not desired
  - add support for horizontal and vertical grids in GeoTIFF, if libtiff is available
  - add GenericShiftGridSet and GenericShiftGrid classes, relying on TIFF grids, that can be used for generic purpose grid-based adjustment
  - add a +proj=xyzgridshift method to perform geocentric translation by grid. Used for French NTF to RGF93 transformation using gr3df97a.tif grid
  - deformation: add support for +grids= for GeoTIFF grids
  - horizontal grid shift: fix failures on points slightly outside a subgrid (fixes #209)

* File management:
  - add a filemanager.cpp/.hpp to deal with file related work
  - test for legacy proj_api.h fileapi
  - proj.h: add proj_context_set_fileapi() and proj_context_set_sqlite3_vfs_name() (fixes #866)
  - add capability to read resource files from the user writable directory

* Network access:
  - build systems: add optional curl dependency
  - add a curl-based default implementation for network related functionality
  - proj.h: add C API to control network functionality, and optionaly provide network callbacks
  - add data/proj.ini with default settings
  - add a SQLite3 local cache of downloaded chunks
  - add proj_is_download_needed() and proj_download_file()

* Use Win32 Unicode APIs and expect all strings to be UTF-8 (fixes #1765)
  For backward compatibility, if PROJ_LIB content is found to be not UTF-8 or
  pointing to a non existing directory, then an attempt at interpretating it
  in the ANSI page encoding is done.
  proj_context_set_search_paths() now assumes strings to be in UTF-8, and
  functions returning paths will also return values in UTF-8.