メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.317027648962 43.0532505184668, 141.317901999726 43.0534905738518, 141.317719332247 43.0540770370115, 141.317609657219 43.0545235768429, 141.316958314178 43.0544323955325, 141.3168797323 43.0544221899987, 141.316712228535 43.0544004989544, 141.316145707681 43.0543256181014, 141.31623664157 43.0538255469273, 141.316393677847 43.0530646013919, 141.317027648962 43.0532505184668)) ^^http://www.opengis.net/ont/geosparql#wktLiteral