dem_mosaic doc: replaced word grow with word extrapolate

docs/examples/csm.rst

@@ -942,7 +942,7 @@ as in :numref:`csm_msl`. The quality of the produced DEM can be quite uneven,
 especially far from the camera. 
 
 Large holes in the initial DEM were filled in with the ``dem_mosaic`` option
-``--fill-search-radius`` (:numref:`dem_mosaic_grow`). 
+``--fill-search-radius`` (:numref:`dem_mosaic_extrapolate`). 
 
 Then, it can be made coarser, for example, as::
 

docs/examples/kaguya.rst

@@ -125,7 +125,7 @@ any holes::
 
 Inspect the produced DEM ``stereo/run-DEM.tif`` in ``stereo_gui`` in hillshading
 mode. Any additional holes can be filled with ``dem_mosaic``
-(:numref:`dem_mosaic_grow`).
+(:numref:`dem_mosaic_extrapolate`).
 
 It is also suggested to blur it a little, to make it smoother::
 

docs/next_steps.rst

@@ -470,7 +470,7 @@ Hole-filling and smoothing the input DEM
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 It is suggested to inspect and then hole-fill the input DEM
-(:numref:`dem_mosaic_grow` and :numref:`dem_mosaic_fill`). 
+(:numref:`dem_mosaic_extrapolate` and :numref:`dem_mosaic_fill`). 
 
 If the input DEM has too much detail, and those features do not agree with the
 images mapprojected on it, this can result in artifacts in the final DEM. A blur
@@ -586,7 +586,7 @@ resolution switched to meters from degrees (see :numref:`dg-mapproj`
 for more details).
 
 This DEM can be hole-filled and blurred with ``dem_mosaic`` if needed
-(:numref:`dem_mosaic_grow`), producing a DEM called
+(:numref:`dem_mosaic_extrapolate`), producing a DEM called
 ``run_nomap/run-smooth.tif``. Inspect the result. It should be smooth and with
 no holes.
 
@@ -711,7 +711,7 @@ misregistration artifacts transfer over to the mapprojected images. Ensure the
 input DEM is relative to an ellipsoid and not a geoid
 (:numref:`conv_to_ellipsoid`). 
 
-Fill and blur the input DEM if needed (:numref:`dem_mosaic_grow`).
+Fill and blur the input DEM if needed (:numref:`dem_mosaic_extrapolate`).
 
 Commands::
 

docs/sfs_usage.rst

@@ -314,7 +314,7 @@ invoked with no input grid size, computes the grid size as the image
 GSD, and that value can then be used when creating the input SfS DEM.
 
 If this DEM has holes, those can be filled in ``dem_mosaic``
-(:numref:`dem_mosaic_grow`). 
+(:numref:`dem_mosaic_extrapolate`). 
 
 The ``dem_mosaic`` program can also apply some blur to attenuate big artifacts
 (:numref:`dem_mosaic_blur`). Use, for example, ``--dem-blur-sigma 2``. Note that
@@ -931,7 +931,7 @@ Any spikes or other artifacts should be blurred, such as by running::
 
     dem_mosaic --dem-blur-sigma 2 ref.tif -o ref_blur.tif
     
-Any holes can also be filled ``dem_mosaic`` (:numref:`dem_mosaic_grow`,
+Any holes can also be filled ``dem_mosaic`` (:numref:`dem_mosaic_extrapolate`,
 :numref:`dem_mosaic_fill`). A subsequent blur with a sigma of 2 pixels is
 suggested (:numref:`dem_mosaic_blur`).
 

docs/tools/dem2gcp.rst

@@ -81,7 +81,7 @@ must be very similar.
    maps are in :numref:`kh7_orig_vs_opt`.
 
 Some hole-filling and blur can be applied to the ASP DEM with ``dem_mosaic``
-(:numref:`dem_mosaic_blur` and :numref:`dem_mosaic_grow`).
+(:numref:`dem_mosaic_blur` and :numref:`dem_mosaic_extrapolate`).
 
 A command as::
 

docs/tools/dem_mosaic.rst

@@ -159,12 +159,12 @@ Fill small holes
 
     dem_mosaic --hole-fill-length 50 input.tif -o output.tif
 
-.. _dem_mosaic_grow:
+.. _dem_mosaic_extrapolate:
 
-Grow a DEM
-^^^^^^^^^^
+Extrapolating a DEM
+^^^^^^^^^^^^^^^^^^^
 
-::
+To extrapolate a DEM based on a weighted average of neighbors, run::
 
     dem_mosaic                  \
         --fill-search-radius 25 \
@@ -177,7 +177,7 @@ This command will become very slow for large ``--fill-search-radius``.
 It is suggested to increase ``--fill-num-passes`` instead.
 
 This method will also grow the DEM outwards, not just within
-a hole.
+a hole, unlike the hole-filling example in :numref:`dem_mosaic_fill`.
 
 It is suggested to blur a little the obtained DEM, such as::
 
@@ -189,11 +189,9 @@ except a small transition area at the boundary, run::
     dem_mosaic --priority-blending-length 20 \
       input.tif blurred.tif -o output.tif
 
-Unlike the fill example in :numref:`dem_mosaic_fill`, in this mode the tool will
-not try to fill small holes of a given diameter that are fully surrounded by
-valid data. Instead, for any pixel that is invalid (lacks data), ``dem_mosaic``
-will search for valid pixels within the specified search radius. If the
-percentage of valid to total number of found pixels is no less than the
+The extrapolation works as follows. For any pixel that is invalid (lacks data),
+``dem_mosaic`` will search for valid pixels within the specified search radius.
+If the percentage of valid to total number of found pixels is no less than the
 specified value, the invalid pixel will be filled with the weighted average of
 the valid pixel values, with the weight given as:
 

docs/tools/point2dem.rst

@@ -536,7 +536,7 @@ Command-line options for point2dem
 
 --dem-hole-fill-len <integer (default: 0)>
     Maximum dimensions of a hole in the output DEM to fill in, in pixels.
-    For large holes, use instead ``dem_mosaic`` (:numref:`dem_mosaic_grow`).
+    For large holes, use instead ``dem_mosaic`` (:numref:`dem_mosaic_extrapolate`).
 
 --orthoimage-hole-fill-len <integer (default: 0)>
     Maximum dimensions of a hole in the output orthoimage to fill