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-rw-r--r--docs/source/apps/cct.rst27
1 files changed, 27 insertions, 0 deletions
diff --git a/docs/source/apps/cct.rst b/docs/source/apps/cct.rst
index 1d2aef20..df81c571 100644
--- a/docs/source/apps/cct.rst
+++ b/docs/source/apps/cct.rst
@@ -15,6 +15,33 @@ Synopsis
**cct** [**-cIostvz** [args]] *+opt[=arg]* ... file ...
+or
+
+ **cct** [**-cIostvz** [args]] {operation_reference} file ...
+
+Where {operation_reference} is one of the possibilities accepted
+by :c:func:`proj_create`, provided it expresses a coordinate operation
+
+- a proj-string,
+ - a WKT string,
+ - an object code (like "EPSG:1671" "urn:ogc:def:coordinateOperation:EPSG::1671"),
+ - an object name. e.g "ITRF2014 to ETRF2014 (1)". In that case as
+ uniqueness is not guaranteed, heuristics are applied to determine the appropriate best match.
+ - a OGC URN combining references for concatenated operations
+ (e.g. "urn:ogc:def:coordinateOperation,coordinateOperation:EPSG::3895,coordinateOperation:EPSG::1618")
+ - a PROJJSON string. The jsonschema is at https://proj.org/schemas/v0.2/projjson.schema.json
+
+ .. versionadded:: 8.0.0
+
+ .. note::
+
+ Before version 8.0.0 only proj-strings could be used to instantiate
+ operations in :program:`cct`.
+
+
+
+
+
Description
***********