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| author | Howard Butler <howard@hobu.co> | 2016-10-09 08:44:21 -0500 |
|---|---|---|
| committer | Howard Butler <howard@hobu.co> | 2016-10-09 08:44:21 -0500 |
| commit | 57af0179aa6d8925a26757603c08680b7f122bcc (patch) | |
| tree | 880d859bfed742d60dd05c387e34f58769cdf4a1 /docs/source/projections/cass.rst | |
| parent | 0301a2863c66c1d0fb1d6e4d88e0df92fbc76d97 (diff) | |
| download | PROJ-57af0179aa6d8925a26757603c08680b7f122bcc.tar.gz PROJ-57af0179aa6d8925a26757603c08680b7f122bcc.zip | |
add a copy of Snyder to the proj.4 repository and use it in doc references
Diffstat (limited to 'docs/source/projections/cass.rst')
| -rw-r--r-- | docs/source/projections/cass.rst | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/docs/source/projections/cass.rst b/docs/source/projections/cass.rst index 48ec80cf..1b81bd13 100644 --- a/docs/source/projections/cass.rst +++ b/docs/source/projections/cass.rst @@ -22,17 +22,17 @@ Although the Cassini projection has been largely replaced by the Transverse Merc .. image:: ./images/cass.png :scale: 50% - :alt: Cassini + :alt: Cassini Usage ##### -There has been little usage of the spherical version of the Cassini, but the ellipsoidal Cassini-Soldner version was adopted by the Ordnance Survey for the official survey of Great Britain during the second half of the 19th century [Steers1970]_. Many of these maps were prepared at a scale of 1:2,500. The Cassini-Soldner was also used for the detailed mapping of many German states during the same period. +There has been little usage of the spherical version of the Cassini, but the ellipsoidal Cassini-Soldner version was adopted by the Ordnance Survey for the official survey of Great Britain during the second half of the 19th century [Steers1970]_. Many of these maps were prepared at a scale of 1:2,500. The Cassini-Soldner was also used for the detailed mapping of many German states during the same period. Example using EPSG 30200 (Trinidad 1903, units in clarke's links):: - $ echo 0.17453293 -1.08210414 | proj +proj=cass +lat_0=10.44166666666667 +lon_0=-61.33333333333334 +x_0=86501.46392051999 +y_0=65379.0134283 +a=6378293.645208759 +b=6356617.987679838 +to_meter=0.201166195164 +no_defs + $ echo 0.17453293 -1.08210414 | proj +proj=cass +lat_0=10.44166666666667 +lon_0=-61.33333333333334 +x_0=86501.46392051999 +y_0=65379.0134283 +a=6378293.645208759 +b=6356617.987679838 +to_meter=0.201166195164 +no_defs 66644.94 82536.22 Example using EPSG 3068 (Soldner Berlin):: @@ -141,5 +141,5 @@ Further reading ############### #. `Wikipedia <https://en.wikipedia.org/wiki/Equirectangular_projection>`_ -#. `John P. Snyder, Map projections—a working manual <https://epic.awi.de/39585/1/USGS_Bulletin_1532.pdf>`_ +#. [Snyder1987]_ #. `EPSG, POSC literature pertaining to Coordinate Conversions and Transformations including Formulas <http://www.ihsenergy.com/epsg/guid7.pdf>`_ |