Index: ../trunk-jpl/src/c/classes/Elements/SegRef.cpp
===================================================================
--- ../trunk-jpl/src/c/classes/Elements/SegRef.cpp	(revision 17622)
+++ ../trunk-jpl/src/c/classes/Elements/SegRef.cpp	(revision 17623)
@@ -245,13 +245,9 @@
 	 * J is assumed to have been allocated of size 1*/
 
 	IssmDouble x1=xyz_list[3*0+0];
-	IssmDouble y1=xyz_list[3*0+1];
-	IssmDouble z1=xyz_list[3*0+2];
 	IssmDouble x2=xyz_list[3*1+0];
-	IssmDouble y2=xyz_list[3*1+1];
-	IssmDouble z2=xyz_list[3*1+2];
 
-	*J=.5*sqrt(pow(x2-x1,2) + pow(y2-y1,2) + pow(z2-z1,2));
+	*J=.5*fabs(x2-x1);
 }
 /*}}}*/
 /*FUNCTION SegRef::GetJacobianDeterminant{{{*/