Doc gdaldem.rst: formatting fix and add a hint [skip travis] [skip ap…

…pveyor]
OSGeo · Feb 26, 2020 · e93c6e6 · e93c6e6
1 parent c2226bb
commit e93c6e6
Showing 1 changed file with 21 additions and 6 deletions.
diff --git a/gdal/doc/source/programs/gdaldem.rst b/gdal/doc/source/programs/gdaldem.rst
@@ -304,12 +304,27 @@ comma as separators are GDAL specific extensions.
 
 For example :
 
-3500   white
-2500   235:220:175
-50%   190 185 135
-700    240 250 150
-0      50  180  50
-nv     0   0   0   0
+::
+
+    3500   white
+    2500   235:220:175
+    50%   190 185 135
+    700    240 250 150
+    0      50  180  50
+    nv     0   0   0   0
+
+
+To implement a "round to the floor value" mode, the elevation value can be
+duplicate with a new value being slightly above the threshold.
+For example to have red in [0,10], green in ]10,20] and blue in ]20,30]:
+
+::
+    0       red
+    10      red
+    10.001  green
+    20      green
+    20.001  blue
+    30      blue
 
 TRI
 ^^^