メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.313162376151 42.2840536921441, 143.312642108711 42.2846492057292, 143.312556021446 42.2847518516128, 143.311967603812 42.284505345601, 143.311440150672 42.2842842985846, 143.311349332367 42.2842463135004, 143.311535882253 42.2841805802982, 143.312560286533 42.2837936704082, 143.313162376151 42.2840536921441)) ^^http://www.opengis.net/ont/geosparql#wktLiteral