メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.042013007202 43.5728244837517, 142.041847610975 43.5725710571851, 142.042870807744 43.5719513319843, 142.043101891374 43.5720027239243, 142.04358097754 43.5717013114516, 142.043933498213 43.5719475390919, 142.043748730424 43.5720322021278, 142.042447497608 43.5726571395229, 142.042013007202 43.5728244837517)) ^^http://www.opengis.net/ont/geosparql#wktLiteral