From d6db300e8b08a606d821eaaf16bb7d589e9c16d5 Mon Sep 17 00:00:00 2001
From: dencheva <dencheva@stsci.edu>
Date: Fri, 4 Feb 2011 14:09:53 +0000
Subject: Added a method to update the scale

git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@11869 fe389314-cf27-0410-b35b-8c050e845b92
---
 wcsutil/hstwcs.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'wcsutil/hstwcs.py')

diff --git a/wcsutil/hstwcs.py b/wcsutil/hstwcs.py
index 62b8e48..f3731b5 100644
--- a/wcsutil/hstwcs.py
+++ b/wcsutil/hstwcs.py
@@ -177,6 +177,13 @@ class HSTWCS(WCS):
         cd22 = self.wcs.cd[1][1]
         self.orientat = RADTODEG(np.arctan2(cd12,cd22))
 
+    def updatePscale(self, scale):
+        """
+        Updates the CD matrix with a new plate scale
+        """
+        self.wcs.cd = self.wcs.cd/self.pscale*scale
+        self.setPscale()
+        
     def readModel(self, update=False, header=None):
         """
         Reads distortion model from IDCTAB.
-- 
cgit