メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.440434771915 40.5083523315953, 141.440436134852 40.5080901659272, 141.442090453092 40.5085763826634, 141.442674679229 40.508751340676, 141.442133426271 40.5098285853725, 141.441713374946 40.5106917526227, 141.440280186582 40.5102799659447, 141.44034539773 40.5094224019505, 141.440434771915 40.5083523315953)) ^^http://www.opengis.net/ont/geosparql#wktLiteral