メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.133529102913 42.6988516562734, 143.132373545702 42.6994681004159, 143.132346742179 42.6994270902975, 143.13165304547 42.6984518307948, 143.132908793311 42.6979620670824, 143.133487740713 42.6987926126586, 143.133529102913 42.6988516562734)) ^^http://www.opengis.net/ont/geosparql#wktLiteral