メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.285670713164 43.1549687080328, 141.28604828022 43.1552463111023, 141.286443228596 43.1555367180073, 141.286832670863 43.1558231388594, 141.285571355799 43.1567172154212, 141.285153727287 43.1570132224194, 141.284219490602 43.1563016347034, 141.283284806031 43.1555896785884, 141.282745857462 43.1551791839016, 141.284367774909 43.1540105367583, 141.28491957861 43.1544163451641, 141.285265326212 43.154670614635, 141.285670713164 43.1549687080328)) ^^http://www.opengis.net/ont/geosparql#wktLiteral