coast.rst: -M argument, mention FORMAT_FLOAT_OUT to reduce number of …

…decimals
GenericMappingTools · Jun 19, 2024 · 13cb868 · 13cb868
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commit 13cb868
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diff --git a/doc/rst/source/coast.rst b/doc/rst/source/coast.rst
@@ -219,6 +219,10 @@ Optional Arguments
     just certain levels (1-4) then use the full syntax **-W**\ *level*/\ *pen*
     and repeat for each level (pen is not used but required to parse the level correctly).
 
+    Since the resolution of the datasets typically are in the order
+    of 100s of meter, consider reducing the number of decimals by
+    setting `FORMAT_FLOAT_OUT <gmt.conf.html#term-FORMAT_FLOAT_OUT>`__.
+
 .. _-N:
 
 **-N**\ *border*\ [/*pen*]