メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.38165446497 43.7679977401638, 142.381953349701 43.768526254733, 142.381908978904 43.7685308761708, 142.381762960763 43.7685623703996, 142.380421352537 43.7689190518778, 142.38012053751 43.7684285801831, 142.379808729412 43.7679058077208, 142.381326455156 43.76744798732, 142.381331360118 43.7674565256659, 142.381647099713 43.7679853899322, 142.38165446497 43.7679977401638)) ^^http://www.opengis.net/ont/geosparql#wktLiteral