Doc: better point to RPC transformer options

OSGeo · Nov 10, 2021 · 3cdad7f · 3cdad7f
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diff --git a/alg/gdaltransformer.cpp b/alg/gdaltransformer.cpp
@@ -1556,7 +1556,8 @@ bool GDALComputeAreaOfInterest(OGRSpatialReference* poSRS,
  * used to specify the identity geotransform (ungeoreference image)
  * <li> RPC_HEIGHT: A fixed height to be used with RPC calculations.
  * <li> RPC_DEM: The name of a DEM file to be used with RPC calculations.
- * <li> Other RPC related options. See GDALCreateRPCTransformer()
+ *      See GDALCreateRPCTransformerV2() for more details.
+ * <li> Other RPC related options. See GDALCreateRPCTransformerV2()
  * <li> INSERT_CENTER_LONG: May be set to FALSE to disable setting up a
  * CENTER_LONG value on the coordinate system to rewrap things around the
  * center of the image.

diff --git a/doc/source/programs/gdalwarp.rst b/doc/source/programs/gdalwarp.rst
@@ -95,6 +95,7 @@ with control information.
 .. option:: -to <NAME=VALUE>
 
     Set a transformer option suitable to pass to :cpp:func:`GDALCreateGenImgProjTransformer2`.
+    See :cpp:func:`GDALCreateRPCTransformerV2()` for RPC specific options.
 
 .. option:: -vshift
 
@@ -133,7 +134,7 @@ with control information.
 .. option:: -et <err_threshold>
 
     Error threshold for transformation approximation (in pixel units -
-    defaults to 0.125, unless, starting with GDAL 2.1, the RPC_DEM warping
+    defaults to 0.125, unless, starting with GDAL 2.1, the RPC_DEM transformer
     option is specified, in which case, an exact transformer, i.e.
     err_threshold=0, will be used).