geometries几何图形转存为geojson文件

    # 输出json文件
    features = []
    for line in pts:    
        (x0,y0,x1,y1) = line 

        geo = {'type': 'LineString', 'coordinates': [ [x0, y0], [x1, y1] ] }
        
        feature = {'type': 'Feature', 'geometry':  geo }

        features.append(feature)

    geometries = {
        'type': 'FeatureCollection',
        'features': features,
    }

    geo_str = json.dumps(geometries) 

    f = open('d:/temp/0000001/roads.json','w')
    f.write(geo_str)
    f.close()