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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import json
# put `./lib` dir on path
sys.path.append("./python")
import renderer
if __name__ == "__main__" :
# create a single tile at 0/0/0.png like tile.osm.org/0/0/0.png
zoom = 0
x = 0
y = 0
# request object holds a Tile XYZ and internally holds mercator extent
req = renderer.Request(x,y,zoom)
# create a vector tile, given a tile request
vtile = renderer.VectorTile(req)
# for a given point representing a spot in NYC
lat = 40.70512
lng = -74.01226
# and some attributes
attr = {"hello":"world"}
# convert to mercator coords
x,y = renderer.lonlat2merc(lng,lat)
# add this point and attributes to the tile
vtile.add_point(x,y,attr)
# print the protobuf as geojson just for debugging
# NOTE: coordinate rounding is by design and
print 'GeoJSON representation of tile (purely for debugging):'
print vtile.to_geojson()
print '-'*60
# print the protobuf message as a string
print 'Protobuf string representation of tile (purely for debugging):'
print vtile
print '-'*60
# print the protobuf message, zlib encoded
print 'Serialized, deflated tile message (storage and wire format):'
print vtile.to_message().encode('zlib')
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