メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.782804483221 35.4152342227794, 136.7803458619 35.4153159683724, 136.780218127752 35.4148631516245, 136.782799139152 35.4147738028498, 136.782804483221 35.4152342227794)) ^^http://www.opengis.net/ont/geosparql#wktLiteral