メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.857949483058 43.3237132631734, 141.858053583688 43.324075526217, 141.858279639375 43.3248439285312, 141.858344256165 43.3250818572841, 141.857456251148 43.3252187080192, 141.857067918 43.3238434531393, 141.856774521984 43.3228741041485, 141.857652369916 43.3227365183449, 141.857917760618 43.3236137108631, 141.857949483058 43.3237132631734)) ^^http://www.opengis.net/ont/geosparql#wktLiteral