メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.256969330124 43.0606170186555, 141.257221426212 43.0606742029457, 141.25746728045 43.0607319645339, 141.257534065219 43.0607539947616, 141.257430675758 43.0608189964805, 141.256868512943 43.0611644287906, 141.256357209824 43.061466344866, 141.255655124759 43.0618811663287, 141.255488101935 43.0617230216135, 141.255335957789 43.0615878641674, 141.254990488577 43.0612664819036, 141.254546975679 43.0608516928042, 141.254583643167 43.0604587330248, 141.256199282399 43.0605431707816, 141.256767569517 43.0605728591703, 141.256881124625 43.0605969834792, 141.256969330124 43.0606170186555)) ^^http://www.opengis.net/ont/geosparql#wktLiteral