メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.391515740608 43.6868133052765, 142.390769765459 43.6866059166742, 142.391312416519 43.6856568821059, 142.392197608079 43.6858632878715, 142.393760604868 43.6862037631298, 142.393518768639 43.6869227993724, 142.393420252519 43.6872669771945, 142.393020017662 43.6871896588284, 142.39310923977 43.686905372682, 142.392386058145 43.68675021598, 142.391686213186 43.6865809619613, 142.391515740608 43.6868133052765)) ^^http://www.opengis.net/ont/geosparql#wktLiteral