メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.373507684602 43.7771213691135, 142.373928205939 43.7778681107205, 142.373142812596 43.7780923083319, 142.373122516155 43.7780980789653, 142.372331440925 43.7783229440127, 142.37210486072 43.7779644157055, 142.371902225291 43.7775981090018, 142.371727250986 43.7772612028389, 142.37153546296 43.7769135754732, 142.371231436515 43.7763769511027, 142.37204034327 43.7761335105509, 142.372851738089 43.7758998547675, 142.373529458045 43.7771151927279, 142.373507684602 43.7771213691135)) ^^http://www.opengis.net/ont/geosparql#wktLiteral