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Document the -R+U option in the global -R #7606

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Document the -R+U option in the global -R #7606

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02037a3
Document the -R+U option in the global -R
joa-quim Jul 4, 2023
6b496e5
Change x coord to make the second test pass again.
joa-quim Jul 5, 2023
4551d69
Merge branch 'master' into Doc+U
Esteban82 May 5, 2024
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8 changes: 4 additions & 4 deletions doc/rst/source/explain_-R.rst_
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Expand Up @@ -5,7 +5,7 @@ The **-R** option

.. _-R:

**-R**\ *xmin*/*xmax*/*ymin*/*ymax*\ [**+r**][**+u**\ *unit*]
**-R**\ *xmin*/*xmax*/*ymin*/*ymax*\ [**+r**][**+u|U**\ *unit*]
Specify the region of interest. |Add_-R|

**Description**
Expand All @@ -17,12 +17,12 @@ The **-R** option defines the map region or data domain of interest. It may be s
geographic regions when using map projections where meridians and parallels are rectilinear, where *xmin*, *xmax*,
*ymin*, and *ymax* refer to the data limits.

#. **-R**\ *xmin*/*xmax*/*ymin*/*ymax*\ **+u**\ *unit*. Append **+u**\ *unit* to the option 1 to specify a region in
#. **-R**\ *xmin*/*xmax*/*ymin*/*ymax*\ **+u|U**\ *unit*. Append **+u**\ *unit* to the option 1 to specify a region in
projected units (e.g., UTM meters) where *xmin*/*xmax*/*ymin*/*ymax* are Cartesian projected coordinates compatible
with the chosen projection and *unit* is an allowable :ref:`distance unit <dist-units>` [e]. The coordinates are relative
to the standard longitude and latitude indicated in the projection (**-J**). For projected regions centered on
to the standard longitude and latitude indicated in the projection (**-J**). For projected regions centered on
(0,0) you may use the short-hand **-R**\ *halfwidth*\ [/*halfheight*]\ **+u**\ *unit*, where *halfheight* defaults
to *halfwidth* if not given. This short-hand requires the **+u** modifier.
to *halfwidth* if not given. This short-hand requires the **+u** modifier. For convenience, we also support the inverse translation, i.e., +Uunit. This modifier can be used to convert your grid coordinates from meters to the specified unit.

#. **-R**\ *xlleft*/*ylleft*/*xuright*/*yuright*\ **+r**. This form is useful for map projections that are oblique,
making meridians and parallels poor choices for map boundaries. Here, we instead specify the lower left corner and
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