メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.37827999632 43.7857468808108, 142.378304934968 43.7857438468023, 142.378565779829 43.7862350776379, 142.378547177823 43.7862406538458, 142.374641502988 43.787423942324, 142.374503179091 43.7873343065933, 142.373999287024 43.7869997597252, 142.373965849357 43.7869775559685, 142.373828201437 43.7868785168385, 142.373394501081 43.7865664621593, 142.376785158617 43.7855814202673, 142.377399133974 43.7854003015048, 142.378018639213 43.7852191895392, 142.37827999632 43.7857468808108)) ^^http://www.opengis.net/ont/geosparql#wktLiteral