correctly set the central longitude when plotting using PlateCarree, note this...

correctly set the central longitude when plotting using PlateCarree, note this doesn't fix the antimeridian issue, but we should do it anyway

pyglance/glance/graphics.py

@@ -221,16 +221,17 @@ def create_cartopy_proj_objects (extents, out_proj4_str=None,) :
 
     # FUTURE, this is not actually useful here now, but hang on to it for bounds setting later in our display process
     # # pull out the longitude/latitude info
-    # lon_left   = extents[0]
-    # lon_right  = extents[1]
+    lon_left   = extents[0]
+    lon_right  = extents[1]
     # lat_bottom = extents[2]
     # lat_top    = extents[3]
-    # lon_mid = calculate_lon_mid(lon_left, lon_right)  # handle lon wraparound case
+    lon_mid = calculate_lon_mid(lon_left, lon_right)  # handle lon wraparound case
     # lat_mid = (lat_top + lat_bottom) / 2.
+    LOG.debug("Using central longitude: " + str(lon_mid))
 
     # for now just use PlateCarree, in
     # FUTURE we will want to pick projections based on our input so we could use x and y when desired
-    input_proj_obj = crs.PlateCarree()
+    input_proj_obj = crs.PlateCarree(central_longitude=lon_mid,)
 
     # FUTURE, we will probably want different projections; select based on the lat/lon range?
     # for reference, here's what cartopy supports: https://scitools.org.uk/cartopy/docs/v0.15/crs/projections.html#cartopy-projections