メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.041847610975 43.5725710571851, 142.041558182214 43.5721095979026, 142.041527262571 43.5720301811583, 142.041633856827 43.572013386859, 142.042211820856 43.5716705564108, 142.042394010582 43.571580229934, 142.042870807744 43.5719513319843, 142.041847610975 43.5725710571851)) ^^http://www.opengis.net/ont/geosparql#wktLiteral