diff --git a/functions.py b/functions.py
index b1b2627..fcdb947 100644
--- a/functions.py
+++ b/functions.py
@@ -7,6 +7,7 @@ from datetime import datetime
 import os
 import shutil
 import pyexiv2
+import fractions
 
 class Radiation:
     ''' Handles CSV processing. '''
@@ -65,13 +66,39 @@ class Photo:
         return pic_aware_time
 
 class Exif:
-    ''' Compiles and writes Exif-Tags from given values. '''
-    def write_exif(photo, radiation, latitude, longitude, dry_run):
+    ''' Converts, compiles and writes Exif-Tags from given values. '''
+    def __init__(self, photo, radiation, latitude, longitude, elevation, dry_run):
+        # self.get_degree = self._to_degree(value, loc)
+        self.write_exif = self._write_exif(photo, radiation, latitude, longitude, elevation, dry_run)
 
-        ''' UNTESTED ! '''
+#    def __repr__(self):
+#        return 'Photo: %s Creation Date: %s' % (str(self.get_target_photo), str(self.get_date))
+
+    def _to_degree(self, value, loc):
+        if value < 0:
+            loc_value = loc[0]
+        elif value > 0:
+            loc_value = loc[1]
+        else:
+            loc_value = ""
+        abs_value = abs(value)
+        deg = int(abs_value)
+        t1 = (abs_value - deg) * 60
+        minute = int(t1)
+        second = round((t1 - minute) * 60, 5)
+        return (deg, minute, second, loc_value) 
+
+    def _write_exif(self, photo, radiation, latitude, longitude, elevation, dry_run):
 
         metadata = pyexiv2.ImageMetadata(photo)
         metadata.read()
+
+        lat_deg = self._to_degree(latitude, ["S", "N"])
+        lng_deg = self._to_degree(longitude, ["W", "E"])
+
+        print(lat_deg)
+        print(lng_deg)
+
         # Set new UserComment
         new_comment = 'Radiation ☢ ' + str(radiation) + ' µS/h'
         # Exif tags to write
@@ -80,12 +107,13 @@ class Exif:
         values = [new_comment, latitude, longitude]
         
         # Create metadata object with all data to write
-        for key, value in zip(keys, values):
+        #for key, value in zip(keys, values):
             # Only create object if there is anything to fill with
-            if value is not None:
-                metadata[key] = pyexiv2.ExifTag(key, value)
+        #    if value is not None:
+        #        metadata[key] = pyexiv2.ExifTag(key, value)
 
         # Write Exif tags to file, if not in dry-run mode
-        if dry_run is not True:
-            metadata.write()
+        #if dry_run is not True:
+        #    metadata.write()
+
         return new_comment
diff --git a/rad_tag.py b/rad_tag.py
index ed614b5..81b4196 100755
--- a/rad_tag.py
+++ b/rad_tag.py
@@ -11,7 +11,7 @@ import csv
 import argparse
 import pytz
 import gpxpy
-from functions import Radiation, Photo
+from functions import Radiation, Photo, Exif
 
 # SIFACTOR for GQ Geiger counters
 
@@ -93,12 +93,14 @@ for src_photo in args.photos:
     print(photo.get_target_photo, photo.get_date)
 
     # Here the matching magic has to happen
-    latitude = '51.0234024'
-    longitude = '7.248347'
+    latitude = 51.0234024
+    longitude = 7.248347
     radiation = '9001'
+    elevation = '55'
+    
     # Write exif data
-    #exif_tags = Photo.write_exif(photo.get_target_photo, radiation, latitude, longitude, args.dry)
-    #print(exif_tags)
+    exif_tags = Exif(photo.get_target_photo, radiation, latitude, longitude, elevation, args.dry)
+    print(exif_tags)
 
 # Print table header
 print('{:<15} {:<25} {:<22}'.format('filename', 'date / time', 'Exif UserComment'))
\ No newline at end of file