determineDistortion(): set Chebyshev2D domain to be from 0 to npix-1 …

…along each axis, consistent with other Chebyshevs
GeminiDRSoftware · Sep 19, 2020 · fd228d1 · fd228d1
1 parent 6cb4669
commit fd228d1
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/geminidr/core/primitives_spect.py b/geminidr/core/primitives_spect.py
@@ -517,8 +517,8 @@ def determineDistortion(self, adinputs=None, **params):
                 # of the data, so it could be used as a gWCS object
                 m_init = models.Chebyshev2D(x_degree=orders[1 - dispaxis],
                                             y_degree=orders[dispaxis],
-                                            x_domain=[0, ext.shape[1]],
-                                            y_domain=[0, ext.shape[0]])
+                                            x_domain=[0, ext.shape[1] - 1],
+                                            y_domain=[0, ext.shape[0] - 1])
                 # x_domain = [x1, x1 + ext.shape[1] * xbin - 1],
                 # y_domain = [y1, y1 + ext.shape[0] * ybin - 1])
                 # Find model to transform actual (x,y) locations to the