用來產生Tile Number,格式可自己調整
https://chart.apis.google.com/chart?chst=d_text_outline&chs=256x256&chf=bg,s,00000044&chld=FFFFFF|32|h|000000|b|||x={x}|y={y}|z={z}||||______________
不過Mapzen已死,有事燒紙...
https://tile.mapzen.com/mapzen/vector/v1/{all/building/earth,landuse}/{z}/{x}/{y}.{mvt/topojson/json/vtm}?api_key=mapzen-Ka4PVaQ