tile


tile(double lat, double lon, int zoom)::bigint – Returns a tile number 2^2n where n is zoom level. tile(lat,lon,zoom) = xtile(lon,zoom) + ytile(lat,zoom) * 2^zoom

refer https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames for detail

Platforms: WhereOS, Spark, Hive
Class: hivemall.geospatial.TileUDF

More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.

Leave a Reply