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Closes #1258
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* Allow arbitrarily complex polygons in geod_polygon_*. In the case
of self-intersecting polygons the area is accumulated
"algebraically", e.g., the areas of the 2 loops in a figure-8
polygon will partially cancel.
* Simplify code by using C99 functions remainder and remquo.
* More test coverage.
Fixes to associated files:
* src/pipeline.cpp invoke geod_init with f = es / (1 + sqrt(1 - es))
instead of (the less accurate) f = 1 - sqrt(1 - es)
* src/apps/geod_set.cpp remove "#undef f" (a dangling relic?).
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calculations with something more helpful to the beginning user.
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Only substantial changes are (1) testing the HAVE_C99_MATH flag and
acting accordingly and (2) adding a couple of tests.
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- http://geographiclib.sf.net -> http://geographiclib.sourceforge.io
- backport fixes for warnings messages from some compilers
- change default range for longitude and azimuth to (-180d, 180d]
(instead of [-180d, 180d))
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Improve accuracy of area calculation (fixing a flaw introduced in
version 1.46). Changed files geodesic.[ch3], geodtest.c, geod.1.
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* upgrade geodesic.[ch3]
* add test suite geodtest.c and invoke via cmake's add_test
* increment version to 4.9.3 and library version to 11.0.0
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http://geographiclib.sourceforge.net/1.44/C/index.html
The changes are:
- Improve accuracy of calculations by evaluating trigonometric
functions more carefully and replacing the series for the reduced
length with one with a smaller truncation error.
- The allowed ranges for longitudes and azimuths is now unlimited; it
used to be [-540d, 540d).
- Enforce the restriction of latitude to [-90d, 90d] by returning NaNs
if the latitude is outside this range.
- The inverse calculation sets s12 to zero for coincident points at
pole (instead of returning a tiny quantity).
This commit also includes a work-around for an inaccurate value for
pi/180 in dmstor.c (see the definitions of DEG_IN and DEG_OUT in
geod_interface.c).
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relatively obscure problems. (1) The business of returning an unrolled
longitude with the solution to the direct problem was broken for
west-going geodesics. (2) For flattening > 1/100, a slight inaccurate
result was returned for a12 in the direct calculation.
git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@2656 4e78687f-474d-0410-85f9-8d5e500ac6b2
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geod_polygon_addedge if the longitude extent of the added edge exceeds 180 degrees (patch by Charles Karney, #251, #253)
git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@2600 4e78687f-474d-0410-85f9-8d5e500ac6b2
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git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@2377 4e78687f-474d-0410-85f9-8d5e500ac6b2
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git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@2335 4e78687f-474d-0410-85f9-8d5e500ac6b2
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