Changed dem-initial-distance default value

Former-commit-id: f808f6aa95

opendm/config.py

@@ -389,9 +389,9 @@ def config():
     parser.add_argument('--dem-initial-distance',
                         metavar='<positive float>',
                         type=float,
-                        default=0.5,
+                        default=0.15,
                         help='Used to classify ground vs non-ground points. Set this value to account for Z noise in meters. '
-                             'If you have an uncertainty of around 50 cm, set this value large enough to not exclude these points. '
+                             'If you have an uncertainty of around 15 cm, set this value large enough to not exclude these points. '
                              'Too small of a value will exclude valid ground points, while too large of a value will misclassify non-ground points for ground ones. '
                              '\nDefault: '
                              '%(default)s')