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Diffstat (limited to 'docs/source/development')
| -rw-r--r-- | docs/source/development/reference/functions.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/source/development/reference/functions.rst b/docs/source/development/reference/functions.rst index 10bb07d0..bf5bb94b 100644 --- a/docs/source/development/reference/functions.rst +++ b/docs/source/development/reference/functions.rst @@ -756,6 +756,15 @@ Various distortion and meridian convergence. Depending on the underlying projection values will be calculated either numerically (default) or analytically. + Starting with PROJ 8.2, the P object can be a projected CRS, for example + instantiated from a EPSG CRS code. The factors computed will be those of the + map projection implied by the transformation from the base geographic CRS of + the projected CRS to the projected CRS. + + The input geodetic coordinate lp should be such that lp.lam is the longitude + in radian, and lp.phi the latitude in radian (thus independently of the + definition of the base CRS, if P is a projected CRS). + The function also calculates the partial derivatives of the given coordinate. |