tilereduce
A framework for writing tile-reduce
map scripts in Python.
NOTE: This library is experimental and under active development. No official
release has been created.
Usage
First read the documentation at tile-reduce.
tile-reduce-py
allows you to write the map script in Python. The reducer is
still Javascript.
import mapbox_vector_tile
import tilereduce
class BuildingRoadCount(tilereduce.TR):
def mapper(self, x, y, zoom, data):
if data is None:
return 0
# Decode the raw binary protocol buffer data
td = mapbox_vector_tile.decoder.TileData(2048)
tile = td.getMessage(data)
count = 0
if tile.get('buildings'):
count += len(tile['buildings'])
if tile.get('roads'):
count += len(tile['roads'])
return count
if __name__ == '__main__':
BuildingRoadCount.main()
The reduce script is identical as the original Node example except the map
argument is now the path to the Python map script.