diff options
Diffstat (limited to 'docs/source/operations/transformations/molodensky.rst')
| -rw-r--r-- | docs/source/operations/transformations/molodensky.rst | 60 |
1 files changed, 41 insertions, 19 deletions
diff --git a/docs/source/operations/transformations/molodensky.rst b/docs/source/operations/transformations/molodensky.rst index d4ff3e79..a90828cd 100644 --- a/docs/source/operations/transformations/molodensky.rst +++ b/docs/source/operations/transformations/molodensky.rst @@ -4,6 +4,8 @@ Molodensky transform ================================================================================ +.. versionadded:: 5.0.0 + The Molodensky transformation resembles a :ref:`Helmert` with zero rotations and a scale of unity, but converts directly from geodetic coordinates to geodetic coordinates, without the intermediate shifts to and from cartesian @@ -17,28 +19,13 @@ reasons, but nevertheless indispensable due to the large amount of data that has already been transformed that way [EversKnudsen2017]_. +---------------------+----------------------------------------------------------+ -| **Input type** | Geodetic coordinates. | -+---------------------+----------------------------------------------------------+ -| **Output type** | Geodetic coordinates. | -+---------------------+----------------------------------------------------------+ -| **Options** | -+---------------------+----------------------------------------------------------+ -| `+da` | Difference in semimajor axis of the defining ellipsoids. | -+---------------------+----------------------------------------------------------+ -| `+df` | Difference in flattening of the defining ellipsoids. | -+---------------------+----------------------------------------------------------+ -| `+dx` | Offset of the X-axes of the defining ellipsoids. | +| **Alias** | molodensky | +---------------------+----------------------------------------------------------+ -| `+dy` | Offset of the Y-axes of the defining ellipsoids. | +| **Domain** | 3D | +---------------------+----------------------------------------------------------+ -| `+dz` | Offset of the Z-axes of the defining ellipsoids. | +| **Input type** | Geodetic coordinates (horizontal), meters (vertical) | +---------------------+----------------------------------------------------------+ -| `+ellps` | Ellipsoid definition of source coordinates. | -| | Any specification can be used (e.g. `+a`, `+rf`, etc). | -| | If not specified, default ellipsoid is used. | -+---------------------+----------------------------------------------------------+ -| `+abridged` | Use the abridged version of the Molodensky transform. | -| | Optional. | +| **output type** | Geodetic coordinates (horizontal), meters (vertical) | +---------------------+----------------------------------------------------------+ The Molodensky transform can be used to perform a datum shift from coordinate @@ -72,3 +59,38 @@ The same transformation using the standard Molodensky:: proj=molodensky a=6378160 rf=298.25 da=-23 df=-8.120449e-8 dx=-134 dy=-48 dz=149 + +Parameters +################################################################################ + +Required +------------------------------------------------------------------------------- + +.. option:: +da=<value> + + Difference in semimajor axis of the defining ellipsoids. + +.. option:: +df=<value> + + Difference in flattening of the defining ellipsoids. + +.. option:: +dx=<value> + + Offset of the X-axes of the defining ellipsoids. + +.. option:: +dy=<value> + + Offset of the Y-axes of the defining ellipsoids. + +.. option:: +dz=<value> + + Offset of the Z-axes of the defining ellipsoids. + +.. include:: ../options/ellps.rst + +Optional +------------------------------------------------------------------------------- + +.. option:: +abridged + + Use the abridged version of the Molodensky transform. |