better selection of default nav variables in the GUI

pyglance/glance/gui_constants.py

@@ -69,8 +69,8 @@ DATA_FORMS = [SIMPLE_2D,
               ONLY_1D]
 
 # the default names that the model will try to select for the latitude and longitude
-DEFAULT_LONGITUDE = 'pixel_longitude'
-DEFAULT_LATITUDE  = 'pixel_latitude'
+DEFAULT_LONGITUDES = ['pixel_longitude', 'longitude', 'Longitude',]
+DEFAULT_LATITUDES  = ['pixel_latitude',  'latitude',  'Latitude',]
 
 # the number of bins to use for histograms
 DEFAULT_NUM_BINS = 50

pyglance/glance/gui_model.py

@@ -242,10 +242,12 @@ class GlanceGUIModel (object) :
                 # set the longitude and latitude names, using the defaults if they exist
                 self.fileData[filePrefix].latitude      = tempVariable
                 self.fileData[filePrefix].longitude     = tempVariable
-                if DEFAULT_LATITUDE  in variableList :
-                    self.fileData[filePrefix].latitude  = DEFAULT_LATITUDE
-                if DEFAULT_LONGITUDE in variableList :
-                    self.fileData[filePrefix].longitude = DEFAULT_LONGITUDE
+                for temp_lat_name in DEFAULT_LATITUDES :
+                    if temp_lat_name  in variableList :
+                        self.fileData[filePrefix].latitude  = temp_lat_name
+                for temp_lon_name in DEFAULT_LONGITUDES :
+                    if temp_lon_name in variableList :
+                        self.fileData[filePrefix].longitude = temp_lon_name
 
                 # make sure the longitude and latitude are loaded into our local cache
                 # TODO, it would be good to background this task at some point