diff options
Diffstat (limited to 'docs/source/operations/projections/tmerc.rst')
| -rw-r--r-- | docs/source/operations/projections/tmerc.rst | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/source/operations/projections/tmerc.rst b/docs/source/operations/projections/tmerc.rst index 2866517b..cf428cff 100644 --- a/docs/source/operations/projections/tmerc.rst +++ b/docs/source/operations/projections/tmerc.rst @@ -83,6 +83,21 @@ Parameters It is faster than the default algorithm, but also diverges faster as the distance from the central meridian increases. +.. option:: +algo=auto/evenden_snyder/poder_engsager + + .. versionadded:: 7.1 + + Selects the algorithm to use. The hardcoded value and the one defined in + :ref:`proj-ini` default to ``poder_engsager``, that is the most precise + one. + + When using auto, a heuristics based on the input coordinate to transform + is used to determine if the faster Evenden-Snyder method can be used, for + faster computation, without causing an error greater than 0.1 mm (for an + ellipsoid of the size of Earth) + + Note that :option:`+approx` and :option:`+algo` are mutually exclusive. + .. include:: ../options/lon_0.rst .. include:: ../options/lat_0.rst |