Index: /issm/trunk-jpl/src/c/Container/Observations.cpp
===================================================================
--- /issm/trunk-jpl/src/c/Container/Observations.cpp	(revision 12227)
+++ /issm/trunk-jpl/src/c/Container/Observations.cpp	(revision 12228)
@@ -56,5 +56,5 @@
 		options->Get(&minlength,"boxlength");
 		if(minlength<=0)_error_("boxlength should be a positive number");
-		maxdepth=int(log(max(xmax-xmin,ymax-ymin)/minlength +1)/log(2));
+		maxdepth=int(log(max(xmax-xmin,ymax-ymin)/minlength +1)/log(2.0));
 	}
 	else{