Special case often used integer top and right to avoid downloading un…

…needed tiles.
bopen · Mar 24, 2016 · d6b6cf2 · d6b6cf2
1 parent 267be0b
commit d6b6cf2
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/elevation/datasource.py b/elevation/datasource.py
@@ -49,6 +49,11 @@ def srtm3_tile_ilonlat(lon, lat):
 def srtmgl1_tiles_names(left, bottom, right, top, tile_name_template='{slat}{slon}.tif'):
     ileft, itop = srtmgl1_tile_ilonlat(left, top)
     iright, ibottom = srtmgl1_tile_ilonlat(right, bottom)
+    # special case often used *integer* top and right to avoid downloading unneeded tiles
+    if top.is_integer():
+        itop -= 1
+    if right.is_integer():
+        iright -= 1
     for ilon in range(ileft, iright + 1):
         slon = '%s%03d' % ('E' if ilon >= 0 else 'W', abs(ilon))
         for ilat in range(ibottom, itop + 1):