メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.938364581374 35.4894770269242, 136.938231437311 35.4899324318631, 136.938243322974 35.4900380160109, 136.938100937478 35.4905335438204, 136.936784312486 35.4902642070338, 136.936740081931 35.4902551788394, 136.936894208541 35.4897596749917, 136.937055167797 35.4891996085245, 136.937156015381 35.4888789628439, 136.937678606452 35.4889841135115, 136.938481360993 35.489145601019, 136.938364581374 35.4894770269242)) ^^http://www.opengis.net/ont/geosparql#wktLiteral