diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/projections/ortho.cpp | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/projections/ortho.cpp b/src/projections/ortho.cpp index 908f283d..9dae0980 100644 --- a/src/projections/ortho.cpp +++ b/src/projections/ortho.cpp @@ -254,15 +254,23 @@ static PJ_LP ortho_e_inverse (PJ_XY xy, PJ *P) { /* Ellipsoidal, inver const double J11 = -rho * sinphi * sinlam; const double J12 = nu * cosphi * coslam; const double J21 = rho * (cosphi * Q->cosph0 + sinphi * Q->sinph0 * coslam); - const double J22 = nu * Q->sinph0 * Q->cosph0 * sinlam; + const double J22 = nu * Q->sinph0 * cosphi * sinlam; const double D = J11 * J22 - J12 * J21; const double dx = xy.x - xy_new.x; const double dy = xy.y - xy_new.y; 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 - (lp.phi - M_PI_2); + lp.lam = adjlon(lp.lam + M_PI); + } + else if( lp.phi < -M_PI_2) + { + lp.phi = -M_PI_2 + (-M_PI_2 - lp.phi); + lp.lam = adjlon(lp.lam + M_PI); + } lp.lam += dlam; if( fabs(dphi) < 1e-12 && fabs(dlam) < 1e-12 ) { |