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diff --git a/docs/source/usage/operations/index.rst b/docs/source/usage/operations/index.rst new file mode 100644 index 00000000..d78f8947 --- /dev/null +++ b/docs/source/usage/operations/index.rst @@ -0,0 +1,22 @@ +.. _operations: + +================================================================================ +Coordinate operations +================================================================================ + +Coordinate operations in PROJ.4 are divided into three groups: +Projections, conversions and transformations. +Projections are purely cartographic mappings of the sphere onto the plane. +Technically projections are conversions (according to ISO standards), though in +PROJ.4 projections are distinguished from conversions. Conversions are coordinate +operations that do not exert a change in reference frame. Operations that do +exert a change in reference frame are called transformations. + +.. toctree:: + :maxdepth: 1 + + projections/index + conversions/index + transformations/index + pipeline + |