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2020-10-25Add +proj=col_urban projection, implementing a EPSG projection method used ↵Even Rouault
by a number of projected CRS in Colombia (fixes #589)
2020-10-25Fix typos spotted by scripts/fix_typos.shEven Rouault
2020-10-23Minor fixes to tmerc documentationCharles Karney
2020-10-23merc.rst: change "origins from 15th cent" to 16th cent.Charles Karney
2020-10-22merc.rst: revert to ln instead of log.Charles Karney
Also define merc (resp. tmerc) as the conformal projection in which the equator (resp. a chosen meridan} projects to a straight line at constant scale.
2020-10-22Flesh out the documentation for MercatorCharles Karney
This addresses item 1 in issue #2387 Things to note: * I made "editorial" changes to the text. The virtues and vices of Mercator are a hot topic. So check these out. (I judged that the text I replaced to be pretty misleading.) * I include the radius of the sphere/ellipsoid in the formulas (and I did this also for my mods for tmerc documentation). Surely this is better than leaving the reader to figure out how this is introduced. * I include the "old-style" (ca 18th century) formulas and the newer ones in terms of hyperbolic functions. The former may be the familiar ones, but the latter are better for computation (more succinct, more accurate, faster, preserve parity). * For the inverse ellipsoidal transformation, I just say that the formula for psi is inverted iteratively. This is probably sufficient, but it could be expanded later.
2020-10-18Document the default poder_engsager algorithm for tmerc. (#2379)Charles Karney
* Document the default poder_engsager algorithm for tmerc. * Give exact expression for phi' in terms of phi * Aadd another datapoint on range of applicability + explanation for complex numbers. * Update tmerc figure with one reflecting poder/engsager algo. Courtesy of @hobu. Co-authored-by: Charles Karney <charles.karney@sri.com>
2020-10-14Plot building Github Action (#2377)Howard Butler
* implement conda package building * paths * need libtool * PLATFORM check * point to my PROJ feedstock for now * point to PROJ repos * plot building and artifact upload * syntax * add proj conda package for plotting * retab * no doxygen * syntax * update docs Makefile * doc building * needs * consolidate doc/plots * plot updates * put updated plot output into docs * register spelling module * use v2 download-artifact * artifact upload
2020-09-30Merge pull request #2361 from rouault/ortho_ellipsoidalEven Rouault
Implement ellipsoidal formulation of +proj=ortho (fixes #397)
2020-09-30Add a +proj=tinshift for triangulation-based transformationsEven Rouault
Implements RFC-6
2020-09-26Implement ellipsoidal formulation of +proj=ortho (fixes #397)Even Rouault
- Map ESRI 'Local' to +proj=ortho when Scale_Factor = 1 and Azimuth = 0 - Map ESRI 'Orthographic' to a PROJ WKT2 'Orthographic (Spherical)' which maps to +proj=ortho +f=0 to froce spherical evaluation
2020-07-01Doc: add alias in pages of transformation methodsEven Rouault
2020-06-03Doc: add specific explanations for lat_ts for +proj=stere, also mentions ↵Even Rouault
+lat_0 and +k_0 (#2255) Refs #2254
2020-06-02Docs: Use +grids and tif file for deformation examplesKristian Evers
2020-05-28Implement wink2 inverse by generic inversion of forward methodEven Rouault
- Move the generic method initiated from adams_ws2 to a pj_generic_inverse_2d() method - Use it in adams_ws2 - Use it in wink2 Fixes https://github.com/qgis/QGIS/issues/35512
2020-05-24Merge pull request #2230 from rouault/limit_peirce_q_to_northern_hemisphereEven Rouault
Limit peirce_q to northern hemisphere, and fix images for adams_hemi, guyou and peirce_q
2020-05-19Zone Definition Fixes for igh_o projection (#2233)John Krasting
- Central lon for zone 2 should be -d10, not d10 - Extra lobe was missing for zone 11 - New figure generated - New test suite values generated
2020-05-19Implemented IGH Oceanic View (#2226)John Krasting
- The current implementation of the Interrupted Goode Homolosine projection emphasizes land area. This is a compliment projection that emphasizes ocean area. - A value of lon0=-160 produces a reasonable real-world map.
2020-05-17Merge pull request #2206 from rouault/deformation_model_for_mergeEven Rouault
Add a +proj=defmodel transformation for multi-component time-based deformation models
2020-05-16Add a +proj=defmodel transformation for multi-component time-based ↵Even Rouault
deformation models Fixes #1001 Co-authored-by: Chris Crook <ccrook@linz.govt.nz>
2020-05-16plotdefs.json: update validty area for adams_hemi, guyou and peirce_q, and ↵Even Rouault
regenerate associated images
2020-05-09scripts/fix_typos.sh: fix URLs to dictionaries, and fix typos spottedEven Rouault
2020-04-28createFromProjString(): handle default parameters of '+krovak +type=crs', ↵Even Rouault
and handle +czech correctly (fixes #2199) (#2200) * createFromProjString(): handle default parameters of '+krovak +type=crs', and handle +czech correctly (fixes #2199) * Doc: add default values for Krovak
2020-04-16Merge pull request #2030 from rouault/auto_sel_of_tmerc_algEven Rouault
tmerc/utm: add a +algo=auto/evenden_snyder/poder_engsager parameter
2020-04-16Implement an iterative inverse method for +proj=adams_ws2Even Rouault
2020-04-15Add square conformal projections from libprojectKristian Evers
This commit adds five new projections to PROJ: adams_hemi: Adams Hemisphere in a Square adams_wsI: Adams World in a Square I adams_wsII: Adams World in a Square II guyou: Guyou peirce_q: Pierce Quincuncial The code originates from Gerry Evendens libproject and has been adapted to work with modern PROJ. To ensure that the modified code works as intended extensive test data has been created using libproject and sproj so that no errors occured when porting from libproject to PROJ. The test data is wrapped in a gie files. All test cases reproduce results from libproject at the mm level.
2020-04-15tmerc/utm: add a +algo=auto/evenden_snyder/poder_engsager parameterEven Rouault
The default remains +alg=poder_engsager. This default value can be changed in proj.ini +algo=auto will use Evenden Synder implementation if the error in doing so remains below 0.1 mm on Earth-sized ellipsoid
2020-04-04Merge pull request #2127 from rouault/projinfo_hide_ballparkEven Rouault
projinfo: add a --hide-ballpark option
2020-04-04createOperations(): improve results of compoundCRS to compoundCRS case ↵Even Rouault
(fixes #2115)
2020-04-04Doc: define 'Ballpark transformation'Even Rouault
2020-03-12Add note about orientation of control pointsB R S Recht
2020-03-11Doc: use 'ellipsoidal' to refer to the ellipsoidal formulation (to be ↵Even Rouault
opposed to the spherical one) Instead of 'elliptical'. Was suggested by @cffk in https://github.com/OSGeo/PROJ/pull/2030#issuecomment-596132341 An elliptical projection is a projection whose global shape fits inside an ellipsoid, like Mollweide. At least according to https://www.merriam-webster.com/dictionary/elliptical%20projection and https://en.wikipedia.org/wiki/Mollweide_projection
2020-03-10utm/ups: make sure to set errno to PJD_ERR_ELLIPSOID_USE_REQUIRED if es==0Even Rouault
ENOMEM was wrongly set after setting PJD_ERR_ELLIPSOID_USE_REQUIRED Note: it is a bit strange to forbid the pure spherical case whereas the maths would allow it. I presume this is due to the typical usage of those methods.
2020-03-05Remove occurences of deprecated PROJ.4 syntaxKristian Evers
+no_defs and +datum has no effect on the behaviour of proj, so can be left out in these examples in the docs. +no_defs in rare occasions would have had an effect in older PROJ versions but not from PROJ 6 and onwards. +datum has ever only been honoured by cs2cs and pj_transform(). Fixes #2017
2020-02-27Doc: Add missing projection property tables (#1992)Chatziargyriou Eleftheria
2020-02-21Doc: advertize lat_0 for proj=nsperEven Rouault
2020-01-28Add +proj=set operation to set component(s) of a coordinate to a fixed valueEven Rouault
Fixes #1846
2020-01-25Fix ingestion of +proj=cea with +k_0Even Rouault
Fixes #1881 Digging into the implementation of proj=cea, it appears that k_0 and lat_ts are intended to be exclusive ways of specifying the same concept. EPSG only models the variant using lat_s. So if k_0 is found and lat_ts is absent, compute the equivalent value of lat_ts from k_0. Note: k_0 should normally be in the [0,1] range. In case creative users would use something outside, we raise an exception, even if the cea implementation could potentially deal with any k_0 value. Hopefully this is a (reasonable) limitation that will address nominal use cases.
2020-01-22Merge RFC4 (#1865)Even Rouault
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.
2020-01-02operations_computation.rst: update with latest 6.3 adjustmentsEven Rouault
2019-12-09isea docs: Rewrite intro and reference to reflect actual projectionKristian Evers
Previous version was describing oea by mistake. It is also a projection by Snyder and the isea docs was based on the paper on the oea projection. This commit fixes that.
2019-12-07Add intro and table to isea doc pageKristian Evers
2019-12-04operations_computation.rst: try to clarify sorting logic [skip appveyor]Even Rouault
2019-11-29operations_computation.rst: fixesEven Rouault
2019-11-29Update docs/source/operations/operations_computation.rstEven Rouault
Co-Authored-By: Kristian Evers <kristianevers@gmail.com>
2019-11-29Update docs/source/operations/operations_computation.rstEven Rouault
Co-Authored-By: Kristian Evers <kristianevers@gmail.com>
2019-11-29Update docs/source/operations/operations_computation.rstEven Rouault
Co-Authored-By: Kristian Evers <kristianevers@gmail.com>
2019-11-29Update docs/source/operations/operations_computation.rstEven Rouault
Co-Authored-By: Kristian Evers <kristianevers@gmail.com>
2019-11-29Update docs/source/operations/operations_computation.rstEven Rouault
Co-Authored-By: Kristian Evers <kristianevers@gmail.com>
2019-11-29Update docs/source/operations/operations_computation.rstEven Rouault
Co-Authored-By: Kristian Evers <kristianevers@gmail.com>
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