メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.273044656897 40.7340882223214, 141.272973966169 40.7340559152678, 141.270393327872 40.7328764343968, 141.271609302385 40.7312313916025, 141.272035641733 40.7306717469254, 141.273324308283 40.7290336442337, 141.276007181416 40.7302841426347, 141.273797284926 40.7331473153844, 141.273044656897 40.7340882223214)) ^^http://www.opengis.net/ont/geosparql#wktLiteral