Index: /tools/gformat.py
===================================================================
--- /tools/gformat.py	(revision 13324)
+++ /tools/gformat.py	(revision 13325)
@@ -1967,7 +1967,7 @@
           datadump = fix_boolean(datadump)
 
-          if datadump['rdnap_x'] and datadump['rdnap_y']:
+          if 'rdnap_x' in datadump and 'rdnap_y' in datadump:
             datadump['latitude'], datadump['longitude'] = map(lambda x: "%.5f" % x, rd2etrs(datadump['rdnap_x'], datadump['rdnap_y']))
-          elif datadump['latitude'] and datadump['longitude']:
+          elif 'latitude' in  datadump and 'longitude' in datadump:
             datadump['rdnap_x'], datadump['rdnap_y'] = etrs2rd(datadump['latitude'], datadump['longitude'])