Doc: Describe possible expansion of -projwin

Author: dbaston

doc/source/programs/gdal_raster_clip.rst

@@ -77,6 +77,7 @@ Standard options
     the input dataset, unless :option:`--bbox-crs` is specified.
     The X and Y axis are the "GIS friendly ones", that is X is longitude or easting,
     and Y is latitude or northing.
+    The bounds are expended if necessary to match input pixel boundaries.
 
 .. option:: --bbox-crs <CRS>
 

doc/source/programs/gdal_translate.rst

@@ -187,11 +187,11 @@ resampling, and rescaling pixels in the process.
 
     .. note::
 
-        In GDAL 2.1.0 and 2.1.1, using -projwin with coordinates not aligned
-        with pixels will result in a sub-pixel shift. This has been corrected
-        in later versions. When selecting non-nearest neighbour resampling,
-        starting with GDAL 2.1.0, sub-pixel accuracy is however used to get
-        better results.
+        When using nearest-neighbor resampling, the window specified by 
+        :option:`-projwin` is expanded if necessary to match input
+        pixel boundaries. For other resampling algorithms, the window
+        is not modified.
+
 
 .. option:: -projwin_srs <srs_def>