メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.653200883399 42.824685485374, 141.653965891935 42.8252463717284, 141.654433701773 42.8255443492438, 141.652974911025 42.8267744650377, 141.652667160146 42.8263906681988, 141.651887018799 42.8257045709543, 141.651436238602 42.8253065188626, 141.652132444557 42.8247673993093, 141.65213451661 42.8247657221456, 141.652417008122 42.8245371386853, 141.65275909411 42.8242218641684, 141.652873193917 42.8244037082846, 141.653167628311 42.824661117248, 141.653200883399 42.824685485374)) ^^http://www.opengis.net/ont/geosparql#wktLiteral