callback({"clipRegion":"{\"center\":{\"x\":1295.3409316093384,\"y\":-875.8819031947322},\"parts\":[5],\"style\":null,\"prjCoordSys\":null,\"id\":0,\"type\":\"REGION\",\"partTopo\":null,\"points\":[{\"x\":697.0940076734191,\"y\":-1374.5254125695928},{\"x\":1893.587855545258,\"y\":-1374.5254125695928},{\"x\":1893.587855545258,\"y\":-377.2383938198716},{\"x\":697.0940076734191,\"y\":-377.2383938198716},{\"x\":697.0940076734191,\"y\":-1374.5254125695928}]}","datasourceName":"Changchun"},0)