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Add geographic offset transformation method.
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of it (fixes #535)
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The Geographic offsets transformation adds an offset to the geographic longitude,
latitude coordinates, and an offset to the ellipsoidal height.
This method is normally only used when low accuracy is tolerated. It is documented
as coordinate operation method code 9619 (for geographic 2D) and 9660 (for
geographic 3D) in the EPSG dataset.
It can also be used to implement the method Geographic2D with Height Offsets
(code 9618) by noting that the input vertical component is a gravity-related
height and the output vertical component is the ellispoid height (dh being
the geoid undulation).
It can also be used to implement the method Vertical offset (code 9616)
It is used for example to transform:
- from the old Greek geographic 2D CRS to the newer GGRS87 CRS
- from Tokyo + JSLD69 height to WGS 84
- from Baltic 1977 height to Black Sea height
It is also useful to document the implicit zero-offset transformation
we do in pipelines such as
+proj=pipeline +step +inv +proj=longlat +ellps=A
+step +proj=longlat +ellps=B
that can be explicited as
+proj=pipeline +step +inv +proj=longlat +ellps=A
+step +proj=geogoffset [+dlon=0 +dlat=0 +dh=0]
+step +proj=longlat +ellps=B
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Documentation building fixes
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There was an issue since transformation.rst which uses this citation is
alphabetically after references.rst.
The documented workaround in https://github.com/mcmtroffaes/sphinxcontrib-bibtex/issues/8
is to rename references.rst as zrefereces.rst, so it is alphabetically last.
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cs2cs_emulation_setup: fix issue with non C-locale
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in +towgs84 case, we use sprintf() with floating-point formatter to output
the ellipsoid parameters. For a locale with decimal separtor != dot, the
resulting string will not be parsed correctly by proj_atof(), leading to
wrong numeric result.
The fix is similar to the one done in pj_latlong_from_proj()
Note for later: if using C++, we could use a locale-independent formatting
solution to avoid such issue.
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- classification
- tests
- coding style
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Fix mistakes in function comments
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Remove misspelled-constant PJD_ERR_UNKNOW_UNIT_ID
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Refactor proj
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https://travis-ci.com/OSGeo/proj.4/jobs/147274068)
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Closes #853
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Added conda environment file too, hopefully making it simpler to get
started in the future.
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Closes #1127
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This removes some questions that are no longer valid
(covered elsewhere in the docs), adjusts the wording in other questions
and fixes formatting and making it proper rst/sphinx syntax.
With this, #1070 is almost fixed.
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Build docs from maintenance branch
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Rename nad/ as data/ and move nad/test* to test/old/*
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Version 6 preparation
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We want to flag that proj_api_h is now deprecated. With this commit
it is now mandatory to #define ACCEPT_USE_OF_DEPRECATED_PROJ_API_H
before proj_api.h can be included.
proj_api.h is used internally a bunch of places. Therefore
ACCEPT_USE_OF_DEPRECATED_PROJ_API_H has been defined in projects.h
and a few other necessary files to ensure that PROJ compiles.
Closes #836
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In version 6 we stop exposing the deprecated projects.h API to the world outside PROJ.
Closes #835
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DOC: Remove free grids from 'Non-Free Grids' section
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These are included with proj-datumgrid:
- Australia
- Canada: ntv2_0.gsb
- Germany: BETA2007.gsb
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Modifications for Intel compilers
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Also, workaround issue:
CMake Error at test/unit/CMakeLists.txt:7 (string):
string sub-command REGEX, mode REPLACE needs at least 6 arguments
total to command.
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Don't install test executables.
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Don't install gtest libraries.
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Fix SONAME decrement from libproj.so.13 to libproj.so.12.
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Increment age instead of revision for added interfaces, see:
https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
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