メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.372849051296 43.7711750213703, 142.371272049943 43.7716116055454, 142.370992713214 43.7710991995968, 142.370691949849 43.7705522191552, 142.372278313882 43.7700909981088, 142.372547114047 43.7700114259368, 142.373145812533 43.7710880696612, 142.372849051296 43.7711750213703)) ^^http://www.opengis.net/ont/geosparql#wktLiteral