メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.774841164642 43.2097271592418, 141.7741159241 43.2105143578622, 141.773946795431 43.2104154072655, 141.77371828673 43.2102866713174, 141.77350106432 43.210177954659, 141.773378879579 43.2101073289016, 141.77332061822 43.2100570839618, 141.774037510184 43.2093244999314, 141.774164841812 43.2093945134866, 141.774841164642 43.2097271592418)) ^^http://www.opengis.net/ont/geosparql#wktLiteral