メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.33886980551 43.7792926936578, 142.33792775612 43.779218720355, 142.339293841431 43.7779224329134, 142.339857276061 43.7774482760971, 142.340239586166 43.7771117272793, 142.340494344285 43.7772652094296, 142.340572219261 43.7771747660429, 142.340909814474 43.7773412949968, 142.340901046982 43.7773481060695, 142.33886980551 43.7792926936578)) ^^http://www.opengis.net/ont/geosparql#wktLiteral