From 5272fd7c83ca75bc69663826e1c5cc3bb6fb0882 Mon Sep 17 00:00:00 2001
From: Frank Warmerdam <warmerdam@pobox.com>
Date: Thu, 12 Dec 2002 19:59:04 +0000
Subject: updated notes on towgs84 parameters

git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@1047 4e78687f-474d-0410-85f9-8d5e500ac6b2
---
 html/gen_parms.html | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'html')

diff --git a/html/gen_parms.html b/html/gen_parms.html
index bc59b116..8cbaeadc 100644
--- a/html/gen_parms.html
+++ b/html/gen_parms.html
@@ -129,6 +129,11 @@ Seven parameter transformation (translation, rotation and scaling):
   z_out = M_BF*(-Ry_BF*x[io] + Rx_BF*y[io] +       z[io]) + Dz_BF;
 </pre>
 
+Note that EPSG method 9607 (coordinate frame rotation) coefficients can be 
+converted to EPSG method 9606 (position vector 7-parameter) supported by
+PROJ.4 by reversing the sign of the rotation vectors.  The methods are
+otherwise the same.<p>
+
 </body>
 </html>
 
-- 
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