メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.104184465329 43.8266202616399, 144.103460234566 43.8268453200684, 144.102759431408 43.8270491610134, 144.102222031119 43.8261678817571, 144.10349185674 43.8257460095267, 144.103638283609 43.8257006138788, 144.104184465329 43.8266202616399)) ^^http://www.opengis.net/ont/geosparql#wktLiteral