メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((140.753754071225 42.8895437898075, 140.753852154247 42.890428997234, 140.753119269699 42.8904656305464, 140.753127510223 42.8905204558235, 140.751651371218 42.8905873128782, 140.751641856357 42.8904903425613, 140.751569076857 42.8897507728565, 140.7515157428 42.8892076816565, 140.751430895202 42.8880103802888, 140.751225828862 42.8858408678082, 140.751633815214 42.8860707677778, 140.752777226283 42.8868333987033, 140.753978284875 42.8877726744392, 140.754836221042 42.8886679393411, 140.755467130171 42.8894517181259, 140.753754071225 42.8895437898075)) ^^http://www.opengis.net/ont/geosparql#wktLiteral