メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.929830060616 35.1933477769825, 136.929819057537 35.1939812237626, 136.92902234805 35.1940030262637, 136.928997964368 35.1935127538415, 136.928969692557 35.1929435280586, 136.929206607498 35.1929101939385, 136.92928107803 35.192907947246, 136.929822770289 35.1928707079515, 136.929849026468 35.1928689281185, 136.929830060616 35.1933477769825)) ^^http://www.opengis.net/ont/geosparql#wktLiteral