diff --git a/osm/grabtiles.py b/osm/grabtiles.py
new file mode 100644
index 0000000..05fced4
--- /dev/null
+++ b/osm/grabtiles.py
@@ -0,0 +1,38 @@
+import math
+import os
+import requests
+
+def deg2num(lat_deg, lon_deg, zoom):
+    lat_rad = math.radians(lat_deg)
+    n = 2.0 ** zoom
+    xtile = int((lon_deg + 180.0) / 360.0 * n)
+    ytile = int((1.0 - math.log(math.tan(lat_rad) + (1 / math.cos(lat_rad))) / math.pi) / 2.0 * n)
+    return (xtile, ytile)
+
+
+COMBO_MAP_MAX_BOUNDS = {
+    "corner1": {"lat": 45.9134, "lng": 4.6733},
+    "corner2": {"lat": 45.5583, "lng": 5.1574}
+}
+
+for zoom in range(3, 19):
+    xtile1, ytile1 = deg2num(COMBO_MAP_MAX_BOUNDS['corner1']['lat'],
+                             COMBO_MAP_MAX_BOUNDS['corner1']['lng'],
+                             zoom)
+    xtile2, ytile2 = deg2num(COMBO_MAP_MAX_BOUNDS['corner2']['lat'],
+                             COMBO_MAP_MAX_BOUNDS['corner2']['lng'],
+                             zoom)
+    for xtile in range(xtile1, xtile2+1):
+        for ytile in range(ytile1, ytile2+1):
+            path = '%s/%s/%s.png' % (zoom, xtile, ytile)
+            if os.path.exists(path):
+                continue
+            url = 'https://tiles.entrouvert.org/hdm/%s/%s/%s.png' % (zoom, xtile, ytile)
+            print url
+            if not os.path.exists(os.path.dirname(path)):
+                os.makedirs(os.path.dirname(path))
+            r = requests.get(url)
+            if r.status_code != 200:
+                continue
+            with open(path, 'w') as fd:
+                fd.write(r.content)