Index: /issm/trunk-jpl/src/m/interp/interp.py
===================================================================
--- /issm/trunk-jpl/src/m/interp/interp.py	(revision 17710)
+++ /issm/trunk-jpl/src/m/interp/interp.py	(revision 17711)
@@ -44,4 +44,5 @@
 
 	# create sub-vectors that just cover the limits of xi and yi
+	# TODO x,y not necessarily a grid, so need a better definition of dx,dy (e.g. average element size)
 	dx=x[1]-x[0]
 	dy=y[1]-y[0]