メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.407030990886 43.7771445495916, 142.405963153864 43.7780217213888, 142.405947138105 43.7780024578011, 142.405296569983 43.7776059769874, 142.403987936458 43.776794538759, 142.404411791172 43.7764320322989, 142.404824569785 43.7760789921525, 142.40503922689 43.7758953980004, 142.405559186332 43.7762322461487, 142.406044427566 43.776524782475, 142.406529703989 43.7768289022635, 142.407009671113 43.7771330110523, 142.407030990886 43.7771445495916)) ^^http://www.opengis.net/ont/geosparql#wktLiteral