メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.853192950972 43.3342786361347, 141.853324443029 43.3347274302427, 141.851693897261 43.3349909809093, 141.851793401663 43.3353211626521, 141.85197910412 43.3359373832988, 141.852055377668 43.336198348493, 141.84982379814 43.33653896357, 141.849747883366 43.3362687144148, 141.849642803323 43.3358946318394, 141.849191134761 43.3342862852609, 141.850916533658 43.3340132540951, 141.851377307834 43.3339403127043, 141.851947533679 43.3338500971951, 141.852447482966 43.333770957356, 141.853017731397 43.3336807363697, 141.853179638843 43.3342332985882, 141.853192950972 43.3342786361347)) ^^http://www.opengis.net/ont/geosparql#wktLiteral