メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((144.968312557512 43.5456160666206, 144.968760613865 43.5458238836352, 144.9688088496 43.5458473824849, 144.968283159847 43.5462862681963, 144.968234798451 43.5462556345097, 144.968045947465 43.5461407624016, 144.967801686413 43.5459932447127, 144.967350398732 43.5457479856062, 144.967822726047 43.5453950366749, 144.968312557512 43.5456160666206)) ^^http://www.opengis.net/ont/geosparql#wktLiteral