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* Introduce geodetic-geocentric conversions, as PJ_xxx style conversion step and as API entry points
* minor improvements and minor bug squashing
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* Removed remaining traces of the builtin selftest system. Moved all functionality to test/gie
* Updated Appveyor and Travis build scripts
* Another appveyor script update
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* Poder dual autochecking implementation
* Debugging aid: Improvements in PJ_vgridshift.c and gie.c
* Most likely, the bugbeing tripped is in the gridshift code, so. uncomment suspicious lines in deformation.gie and merge this to support the debugging effort
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proj_create is now indifferent whether or not proj definition terms start with a '+' character. Also, improve gie to support testing this.
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Kinematic deformation models are used in some geodetic transformations.
This commit introduces the ability to do transformations involving a
gridded deformation/velocity model. For practical reasons a gridded deformation
model needs to be split into two seperate files, one for the horizontal
components and one for the vertical component. For this we use formats
already known to PROJ.4, namely the CTable/CTable2 and the GTX formats.
Grids are specified in the proj-string with +xy_grids and +z_grids.
Grid values are expected to be in m/year. The kinematic part of the
operation is controlled by the +t_epoch parameter, which is the central
epoch of the transformation. An observation epoch is also needed. It can
be specified either in the PJ_OBS input as the fourth element in the
coordinate, or in the proj-string with +t_obs. If +t_obs is present in
the proj-string it takes presedence over the value in the PJ_OBS
coordinate.
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* Repair gie and cct after breakage due to proj_strtod update
* Remove unused variables
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improved docs, improved strtod - avoid precision loss for very long fractions
Switch gie.c to use same framework as cct.c
numerous improvements in proj_strtod.c and gie.c
Add gie to the build system
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