Fix index computation

Author: jochenklar

isimip_files_api/netcdf.py

@@ -22,7 +22,7 @@ def get_index(path, point):
         dx = ds.variables['lon'][1] - ds.variables['lon'][0]
         dy = ds.variables['lat'][1] - ds.variables['lat'][0]
 
-        ix = round((lon - ds.variables['lon'][0]) / dx)
-        iy = round((lat - ds.variables['lat'][0]) / dy)
+        ix = int(round((lon - ds.variables['lon'][0]) / dx))
+        iy = int(round((lat - ds.variables['lat'][0]) / dy))
 
         return ix, iy