TangSY / echarts-map-demo

适用于echarts、QGIS等地图geoJson行政区划边界数据的实时获取与应用，json格式数据，全国省市区县多级联动下钻，真正意义的下钻至县级【附最新全国省市区县乡镇三级或四级城市geoJson文件下载，另可下载四级联动或五级（村级）行政编码对应关系】

w8r / martinez

Martinez-Rueda polygon clipping algorithm, does boolean operation on polygons (multipolygons, polygons with holes etc): intersection, union, difference, xor

datasets / geo-countries

Country polygons as GeoJSON in a datapackage