メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.884777133338 43.0161113854534, 142.884247002304 43.0157881309147, 142.884039937824 43.0156534690755, 142.884085245449 43.0156136937807, 142.885038016036 43.0148009017269, 142.885305403528 43.0149672969746, 142.885764479897 43.0152500796504, 142.884833368859 43.0160625472359, 142.884777133338 43.0161113854534)) ^^http://www.opengis.net/ont/geosparql#wktLiteral