Index: /trunk/Ohana/src/getstar/src/MatchImages.c
===================================================================
--- /trunk/Ohana/src/getstar/src/MatchImages.c	(revision 38597)
+++ /trunk/Ohana/src/getstar/src/MatchImages.c	(revision 38598)
@@ -23,13 +23,14 @@
   /* we keep the original crpix1,2 and crref1,2 */
   /* for mosaic astrometry, the grid should be w.r.t. the tangent-plane, not chip coords */
-  InitCoords (&tcoords, "DEC--TAN");
+
+  InitCoords (&tcoords, "DEC--ARC");
+  tcoords.cdelt1 = tcoords.cdelt2 = 1.0 / 3600.0;
+
+  tcoords.crval1 = image[0].coords.crval1;
+  tcoords.crval2 = image[0].coords.crval2;
   if (!strcmp (&image[0].coords.ctype[4], "-WRP")) {
     myAssert (image[0].coords.mosaic, "should already have tested this");
-    tcoords = image[0].coords.mosaic[0];
-    tcoords.cdelt1 = tcoords.cdelt2 = 1.0 / 3600.0;
-    /* register so image->sky conversions below have correct mosaic */
-  } else {
-    tcoords = image[0].coords;
-    tcoords.cdelt1 = tcoords.cdelt2 = 1.0 / 3600.0;
+    tcoords.crval1 = image[0].coords.mosaic[0].crval1;
+    tcoords.crval2 = image[0].coords.mosaic[0].crval2;
   }