reducing the tolerance for relative volume difference in the test

Author: WPringle

Tests/TestInterp.m

@@ -55,13 +55,17 @@
 end
 
 % Check the different mesh volumes
-disp('Mesh Volumes:')
+disp('Mesh volumes:')
 disp(volumes)
 
-if max(volumes)-min(volumes)/mean(volumes) > 0.01
+volume_diff = (max(volumes)-min(volumes))/mean(volumes);
+disp('Maximum relative volume difference:')
+disp(volume_diff)
+
+if volume_diff > 0.001
     error('Mesh volumes are too disparate with different dems')
+    disp('Not Passed: Interp');
 else
-    disp('Mesh volumes are within 1% of each other')
+    disp('Mesh volumes are within 0.1% of each other')
+    disp('Passed: Interp');
 end
-
-disp('Passed: Interp');