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| author | Even Rouault <even.rouault@spatialys.com> | 2021-09-15 06:41:23 +0200 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2021-09-15 06:58:26 +0200 |
| commit | d209e4ab62e9ab6f1c3825acd518bec421aebf12 (patch) | |
| tree | 70ee380c12a202a82b4883783cb40f120ebb533a /src/projections | |
| parent | 3bd64e8532521d61119df0a6a365a0a32b5c9b15 (diff) | |
| download | PROJ-d209e4ab62e9ab6f1c3825acd518bec421aebf12.tar.gz PROJ-d209e4ab62e9ab6f1c3825acd518bec421aebf12.zip | |
Inverse ellipsoidal orthographic projection (oblique case): fix convergence at pole
Diffstat (limited to 'src/projections')
| -rw-r--r-- | src/projections/ortho.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/projections/ortho.cpp b/src/projections/ortho.cpp index d2d113ef..c334f398 100644 --- a/src/projections/ortho.cpp +++ b/src/projections/ortho.cpp @@ -261,8 +261,16 @@ static PJ_LP ortho_e_inverse (PJ_XY xy, PJ *P) { /* Ellipsoidal, inver const double dphi = (J22 * dx - J12 * dy) / D; const double dlam = (-J21 * dx + J11 * dy) / D; lp.phi += dphi; - if( lp.phi > M_PI_2) lp.phi = M_PI_2; - else if( lp.phi < -M_PI_2) lp.phi = -M_PI_2; + if( lp.phi > M_PI_2) + { + lp.phi = M_PI_2 - (M_PI_2 - lp.phi); + lp.lam = adjlon(lp.lam + 180); + } + else if( lp.phi < -M_PI_2) + { + lp.phi = -M_PI_2 + (-M_PI_2 - lp.phi); + lp.lam = adjlon(lp.lam + 180); + } lp.lam += dlam; if( fabs(dphi) < 1e-12 && fabs(dlam) < 1e-12 ) { |