Index: trunk/psLib/src/astro/psCoord.h
===================================================================
--- trunk/psLib/src/astro/psCoord.h	(revision 39926)
+++ trunk/psLib/src/astro/psCoord.h	(revision 41531)
@@ -348,5 +348,6 @@
     const psPlaneTransform *in,        ///< transform to invert
     psRegion region,                   ///< region to fit for non-linear transform inversion
-    int nSamples                       ///< number of samples in each axis for fit
+    int nSamples,                       ///< number of samples in each axis for fit
+    int extraOrders			///< increase the order of the output by the amount vs input, if input is non-linear
 );