メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.335122568526 43.7613976973115, 142.33587118083 43.7616323352294, 142.335280716096 43.7626394496592, 142.335260610626 43.7626930854662, 142.334500242141 43.7624718480311, 142.333696148258 43.7622360291691, 142.33376158228 43.762137266951, 142.334342016947 43.7611569764805, 142.335122568526 43.7613976973115)) ^^http://www.opengis.net/ont/geosparql#wktLiteral