メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.707044082857 44.3773902580623, 141.706638465013 44.3775315503719, 141.706472226531 44.3773107454252, 141.705556816551 44.3760288941562, 141.705079453296 44.3753873443702, 141.707957946922 44.3736397139015, 141.707884218022 44.374012450694, 141.707238648721 44.3764396204371, 141.707044082857 44.3773902580623)) ^^http://www.opengis.net/ont/geosparql#wktLiteral