メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.346656361047 43.7709527328483, 142.346684640449 43.7710368655794, 142.346699367983 43.7710806461514, 142.346777486132 43.7712801503405, 142.346782437771 43.7712928043755, 142.345300848342 43.7715161459166, 142.345208268664 43.7711861873758, 142.345110760509 43.7708070614215, 142.345788943673 43.7707151917515, 142.346459609262 43.7706293351904, 142.346656361047 43.7709527328483)) ^^http://www.opengis.net/ont/geosparql#wktLiteral