全国省县json坐标, "citycode": "010", "adcode": "110000", "name": "北京市", "center": "116.407394,39.904211", "level": "province", "districts": [{ "citycode": "010", "adcode": "110100", "name": "北京城区", "center": "116.407394,39.904211", "level": "city