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authorKristian Evers <kristianevers@gmail.com>2018-03-17 21:07:24 +0100
committerKristian Evers <kristianevers@gmail.com>2018-03-17 21:07:24 +0100
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Move application docs to top level.
The 'Applications' chapter is moved to the top level of the website in order to make it easier for users to find the pages quickly instead of having to search through sub-sections in other chapters.
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-.. _cct:
-
-================================================================================
-cct
-================================================================================
-
-.. Index:: cct
-
-.. only:: html
-
- Coordinate Conversion and Transformation.
-
-Synopsis
-********
-
- **cct** [ **-cotvz** [ args ] ] *+opts[=arg]* file[s]
-
-Description
-***********
-
-:program:`cct` a 4D equivalent to the :program:`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.
-
-
-The following control parameters can appear in any order:
-
-.. program:: cct
-
-.. option:: -c <x,y,z,t>
-
- Specify input columns for (up to) 4 input parameters. Defaults to 1,2,3,4.
-
-.. option:: -o <output file name>, --output=<output file name>
-
- Specify the name of the output file.
-
-.. option:: -t <time>, --time=<time>
-
- Specify a fixed observation time to be used for all input data.
-
-.. option:: -z <height>, --height=<height>
-
- Specify a fixed observation height to be used for all input data.
-
-.. option:: -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.
-
-.. only:: html
-
- For a complete description consult the :ref:`projection pages <projections>`.
-
-
-:program:`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).
-
-Examples
-********
-
-1. The operator specs describe the action to be performed by :program:`cct`. So
- the following script
-
-.. code-block:: console
-
- 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
-
-.. code-block:: console
-
- echo 12 55 | cct -z0 -t0 +proj=utm +zone=32 +ellps=GRS80
-
-Should give results comparable to the classic proj command
-
-.. code-block:: console
-
- echo 12 55 | proj +proj=utm +zone=32 +ellps=GRS80
-
-2. Convert geographical input to UTM zone 32 on the GRS80 ellipsoid:
-
-.. code-block:: console
-
- cct +proj=utm +ellps=GRS80 +zone=32
-
-3. Roundtrip accuracy check for the case above:
-
-.. code-block:: console
-
- 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:
-
-.. code-block:: console
-
- 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:
-
-.. code-block:: console
-
- cct -t 0 -z 0 +proj=utm +ellps=GRS80 +zone=32
-
-
-Background
-**********
-
-:program:`cct` 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 :program:`cct` (the program).
-
-
-.. only:: man
-
- See also
- ********
-
- **proj(1)**, **cs2cs(1)**, **geod(1)**, **gie(1)**
-
- Bugs
- ****
-
- A list of know bugs can be found at http://github.com/OSGeo/proj.4/issues
- where new bug reports can be submitted to.
-
- Home page
- *********
-
- http://proj4.org/