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diff --git a/docs/source/usage/apps/cct.rst b/docs/source/usage/apps/cct.rst deleted file mode 100644 index 014e7732..00000000 --- a/docs/source/usage/apps/cct.rst +++ /dev/null @@ -1,138 +0,0 @@ -.. _cct: - -================================================================================ -cct -================================================================================ - - -.. Index:: cct - - - - -``cct`` a 4D equivalent to the ``proj`` projection -program, performs transformation coordinate systems on a set of input points. -The coordinate system transformation can include translation between -projected and geographic coordinates as well as the application of datum shifts. - -cct is an acronym meaning *Coordinate Conversion and Transformation*. - -The acronym refers to definitions given in the OGC 08-015r2/ISO-19111 -standard "Geographical Information -- Spatial Referencing by Coordinates", -which defines two different classes of *coordinate operations*: - -*Coordinate Conversions*, which are coordinate operations where input -and output datum are identical (e.g. conversion from geographical to -cartesian coordinates) and - -*Coordinate Transformations*, which are coordinate operations where -input and output datums differ (e.g. change of reference frame). - -``cct``, however, also refers to Carl Christian Tscherning (1942--2014), -professor of Geodesy at the University of Copenhagen, mentor and advisor -for a generation of Danish geodesists, colleague and collaborator for -two generations of global geodesists, Secretary General for the -International Association of Geodesy, IAG (1995--2007), fellow of the -American Geophysical Union (1991), recipient of the IAG Levallois Medal -(2007), the European Geosciences Union Vening Meinesz Medal (2008), and -of numerous other honours. - -cct, or Christian, as he was known to most of us, was recognized for his -good mood, his sharp wit, his tireless work, and his great commitment to -the development of geodesy -- both through his scientific contributions, -comprising more than 250 publications, and by his mentoring and teaching -of the next generations of geodesists. - -As Christian was an avid Fortran programmer, and a keen Unix connoisseur, -he would have enjoyed to know that his initials would be used to name a -modest Unix style transformation filter, hinting at the tireless aspect -of his personality, which was certainly one of the reasons he accomplished -so much, and meant so much to so many people. - -Hence, in honour of cct (the geodesist) this is cct (the program). - - - -Synopsis -******** - -:: - - cct [ -cotvz [ args ] ]... +opts[=arg]... file... - -Description -*********** -The following control parameters can appear in any order: - -:: - - -c x,y,z,t - --columns=x,y,z,t - Specify input columns for (up to) 4 input parameters. Defaults to 1,2,3,4 - - -o <output file name> - --output=<output file name> - Specify the name of the output file. - - -t <time> - --time=<time> - Specify a fixed observation time to be used for all input data. - - -z <height> - --height=<height> - Specify a fixed observation height to be used for all input data. - - -v - --verbose - Write non-essential, but potentially useful, information to stderr. - Repeat for additional information (-vv, -vvv, etc.) - -The ``+args`` arguments are associated with coordinate operation parameters. Usage varies with -operation. For a complete description consult the `projection pages <../projections/index.html>`_ - - -Examples -******** - -1. The operator specs describe the action to be performed by cct. So the following script - -:: - - echo 12 55 0 0 | cct +proj=utm +zone=32 +ellps=GRS80 - -will transform the input geographic coordinates into UTM zone 32 coordinates. -Hence, the command - -:: - - echo 12 55 | cct -z0 -t0 +proj=utm +zone=32 +ellps=GRS80 - -Should give results comparable to the classic proj command - -:: - - echo 12 55 | proj +proj=utm +zone=32 +ellps=GRS80 - -2. Convert geographical input to UTM zone 32 on the GRS80 ellipsoid: - -:: - - cct +proj=utm +ellps=GRS80 +zone=32 - -3. Roundtrip accuracy check for the case above: - -:: - - cct +proj=pipeline +proj=utm +ellps=GRS80 +zone=32 +step +step +inv - -4. As (2) but specify input columns for longitude, latitude, height and time: - -:: - - cct -c 5,2,1,4 +proj=utm +ellps=GRS80 +zone=32 - -5. As (2) but specify fixed height and time, hence needing only 2 cols in input: - -:: - - cct -t 0 -z 0 +proj=utm +ellps=GRS80 +zone=32 |