给矢量设置坐标系/投影（python）

无投影信息

自己设置

def intersection(shp1, shp2, outshp):
    """
    :param shp1:   缓冲区矢量路径
    :param shp2:   目标矢量路径
    :param outshp:  输出矢量路径
    :return:
    """
    driver = ogr.GetDriverByName("ESRI Shapefile")
    dataSource1 = driver.Open(shp1, 1)
    layer1 = dataSource1.GetLayer()

    dataSource2 = driver.Open(shp2, 1)
    layer2 = dataSource2.GetLayer()

    # 获取到shp的投影坐标系信息
    prosrs = layer1.GetSpatialRef()
    geosrs = osr.SpatialReference()
    # 设置输出坐标系为WGS84
    geosrs.SetProjection("GCS_WGS_1984")

    # 新建DataSource，Layer
    out_ds = driver.CreateDataSource(outshp)
    out_lyr = out_ds.CreateLayer(outshp, prosrs, ogr.wkbPolygon)
    def_feature = out_lyr.GetLayerDefn()

    for feature in layer1:
        geom = feature.GetGeometryRef()
        for feature_ in layer2:
            geom_ = feature_.GetGeometryRef()
            if geom.Intersect(geom_) == 1:
                out_feature = ogr.Feature(def_feature)
                out_feature.SetGeometry(geom_)
                out_lyr.CreateFeature(out_feature)

    out_ds.FlushCache()
    del dataSource1, dataSource2

    # 写入投影文件
    geosrs.MorphFromESRI()
    prjfile = open(outshp.replace('.shp','.prj'),'w')
    prjfile.write(geosrs.ExportToWkt())
    prjfile.close()

有投影信息

投影信息来源于.prj文件中。

def intersection(shp1, shp2, outshp):
    """
    :param shp1:   缓冲区矢量路径
    :param shp2:   目标矢量路径
    :param outshp:  输出矢量路径
    :return:
    """
    driver = ogr.GetDriverByName("ESRI Shapefile")
    dataSource1 = driver.Open(shp1, 1)
    layer1 = dataSource1.GetLayer()
    spatialref = layer1.GetSpatialRef()
    
    dataSource2 = driver.Open(shp2, 1)
    layer2 = dataSource2.GetLayer()

    # 新建DataSource，Layer
    out_ds = driver.CreateDataSource(outshp)
    out_lyr = out_ds.CreateLayer(outshp, spatialref, ogr.wkbPolygon)
    def_feature = out_lyr.GetLayerDefn()

    for feature in layer1:
        geom = feature.GetGeometryRef()
        for feature_ in layer2:
            geom_ = feature_.GetGeometryRef()
            if geom.Intersect(geom_) == 1:
                out_feature = ogr.Feature(def_feature)
                out_feature.SetGeometry(geom_)
                out_lyr.CreateFeature(out_feature)

    out_ds.FlushCache()
    del dataSource1, dataSource2