メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.78281919456 35.4156969256958, 136.780360054893 35.4157672621146, 136.780219129806 35.415184972051, 136.78013009522 35.4148697382148, 136.780218127752 35.4148631516245, 136.7803458619 35.4153159683724, 136.782804483221 35.4152342227794, 136.78281919456 35.4156969256958)) ^^http://www.opengis.net/ont/geosparql#wktLiteral