diff --git a/opendm/config.py b/opendm/config.py
index 9be0f24b..ed5ace94 100755
--- a/opendm/config.py
+++ b/opendm/config.py
@@ -401,21 +401,6 @@ def config(argv=None, parser=None):
                         help='Improve the accuracy of the point cloud by computing geometrically consistent depthmaps. This increases processing time, but can improve results in urban scenes. '
                              'Default: %(default)s')    
 
-    parser.add_argument('--pc-sharp',
-                        action=StoreTrue,
-                        nargs=0,
-                        default=False,
-                        help='Improve the accuracy of the point cloud by applying filters to sharpen the pointcloud, but reduces the completeness of the reconstruction. '
-                             'Default: %(default)s')    
-
-    parser.add_argument('--pc-subreslevel',
-                        metavar='<positive integer>',
-                        action=StoreValue,
-                        default=2,
-                        type=int,
-                        help=('The number of lower resolutions to process before estimating output resolution depthmap. '
-                              'Default: %(default)s'))
-
     parser.add_argument('--smrf-scalar',
                         metavar='<positive float>',
                         action=StoreValue,
diff --git a/opendm/photo.py b/opendm/photo.py
index 4d1f97cc..d999b3f6 100644
--- a/opendm/photo.py
+++ b/opendm/photo.py
@@ -81,6 +81,11 @@ def get_mm_per_unit(resolution_unit):
 class PhotoCorruptedException(Exception):
     pass
 
+class GPSRefMock:
+    def __init__(self, ref):
+        self.values = [ref]
+
+
 class ODM_Photo:
     """ODMPhoto - a class for ODMPhotos"""
 
@@ -209,8 +214,14 @@ class ODM_Photo:
                         self.altitude *= -1
                 if 'GPS GPSLatitude' in tags and 'GPS GPSLatitudeRef' in tags:
                     self.latitude = self.dms_to_decimal(tags['GPS GPSLatitude'], tags['GPS GPSLatitudeRef'])
+                elif 'GPS GPSLatitude' in tags:
+                    log.ODM_WARNING("GPS position for %s might be incorrect, GPSLatitudeRef tag is missing (assuming N)" % self.filename)
+                    self.latitude = self.dms_to_decimal(tags['GPS GPSLatitude'], GPSRefMock('N'))
                 if 'GPS GPSLongitude' in tags and 'GPS GPSLongitudeRef' in tags:
                     self.longitude = self.dms_to_decimal(tags['GPS GPSLongitude'], tags['GPS GPSLongitudeRef'])
+                elif 'GPS GPSLongitude' in tags:
+                    log.ODM_WARNING("GPS position for %s might be incorrect, GPSLongitudeRef tag is missing (assuming E)" % self.filename)
+                    self.longitude = self.dms_to_decimal(tags['GPS GPSLongitude'], GPSRefMock('E'))
                 if 'Image Orientation' in tags:
                     self.orientation = self.int_value(tags['Image Orientation'])
             except (IndexError, ValueError) as e:
diff --git a/stages/openmvs.py b/stages/openmvs.py
index 85435604..9ea5b49c 100644
--- a/stages/openmvs.py
+++ b/stages/openmvs.py
@@ -60,6 +60,7 @@ class ODMOpenMVSStage(types.ODM_Stage):
             log.ODM_INFO("Estimating depthmaps")
             number_views_fuse = 2
             densify_ini_file = os.path.join(tree.openmvs, 'Densify.ini')
+            subres_levels = 2 # The number of lower resolutions to process before estimating output resolution depthmap.
 
             config = [
                 " --resolution-level %s" % int(resolution_level),
@@ -68,7 +69,7 @@ class ODMOpenMVSStage(types.ODM_Stage):
                 "--max-resolution %s" % int(outputs['undist_image_max_size']),
                 "--max-threads %s" % args.max_concurrency,
                 "--number-views-fuse %s" % number_views_fuse,
-                "--sub-resolution-levels %s" % args.pc_subreslevel,
+                "--sub-resolution-levels %s" % subres_levels,
                 '-w "%s"' % depthmaps_dir, 
                 "-v 0"
             ]
@@ -84,12 +85,9 @@ class ODMOpenMVSStage(types.ODM_Stage):
             if not args.pc_geometric:
                 config.append("--geometric-iters 0")
 
-            if args.pc_sharp:
-                with open(densify_ini_file, 'w+') as f:
-                    f.write("Optimize = 7\n")
-            else:
-                with open(densify_ini_file, 'w+') as f:
-                    f.write("Optimize = 3\n")
+            sharp = args.pc_filter > 0
+            with open(densify_ini_file, 'w+') as f:
+                f.write("Optimize = %s\n" % (7 if sharp else 3))
 
             def run_densify():
                 system.run('"%s" "%s" %s' % (context.omvs_densify_path,