diff options
| author | Even Rouault <even.rouault@spatialys.com> | 2019-10-13 12:59:42 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2019-10-13 12:59:42 +0200 |
| commit | 5a641f872bd7913143e1400be8661cc8deae72e3 (patch) | |
| tree | 481504417ea655c641d4c9f9bdbaecfeaff05b67 /docs/source | |
| parent | c9c72da7a8b0fbe436b529a7aaffc81f0fabf183 (diff) | |
| parent | c1ef192087eaf7d302065ae9196ca31abde02900 (diff) | |
| download | PROJ-5a641f872bd7913143e1400be8661cc8deae72e3.tar.gz PROJ-5a641f872bd7913143e1400be8661cc8deae72e3.zip | |
Merge pull request #1668 from OSGeo/backport-1653-to-6.2
[Backport 6.2] ob_tran doc: fix/clarify semantics of o_lat_p/o_lon_p
Diffstat (limited to 'docs/source')
| -rw-r--r-- | docs/source/operations/projections/ob_tran.rst | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/docs/source/operations/projections/ob_tran.rst b/docs/source/operations/projections/ob_tran.rst index 378f1333..3a23259d 100644 --- a/docs/source/operations/projections/ob_tran.rst +++ b/docs/source/operations/projections/ob_tran.rst @@ -19,9 +19,10 @@ oblique projection by means of the General Oblique Transformation. The user performs the oblique transformation by selecting the oblique projection ``+proj=ob_tran``, specifying the translation factors, :option:`+o_lat_p`, and :option:`+o_lon_p`, and the projection to be used, :option:`+o_proj`. In the -example of the Fairgrieve projection the latitude and longitude of the pole of -the new coordinates, :math:`\alpha` and :math:`\beta` respectively, are to be placed -at 45°N and 90°W and use the :ref:`moll` projection. Because the central meridian +example of the Fairgrieve projection, the latitude and longitude of the North pole +of the unrotated geographic CRS, :math:`\alpha` and :math:`\beta` respectively, +expressed in the rotated geographic CRS, are to be placed +at 45°N and 90°W and the :ref:`moll` projection is used. Because the central meridian of the translated coordinates will follow the :math:`\beta` meridian it is necessary to translate the translated system so that the Greenwich meridian will pass through the center of the projection by offsetting the central meridian. @@ -50,11 +51,11 @@ New pole .. option:: +o_lat_p=<latitude> - Latitude of new pole for oblique projection. + Latitude of the North pole of the unrotated source CRS, expressed in the rotated geographic CRS. .. option:: +o_lon_p=<longitude> - Longitude of new pole for oblique projection. + Longitude of the North pole of the unrotated source CRS, expressed in the rotated geographic CRS. Rotate about point ................................................................................ |