メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.765106111277 43.1831961137631, 141.764716035944 43.1836263415513, 141.764815188231 43.1838548367272, 141.764794509839 43.1840089078674, 141.764361412537 43.1841180458082, 141.764225632378 43.1836907179923, 141.764073907836 43.1832382155489, 141.764039570662 43.1831384850467, 141.763888457155 43.1826941432783, 141.763542655216 43.1815081353641, 141.764367598224 43.1819262992394, 141.764816514808 43.1821543813988, 141.765354821188 43.182423771916, 141.765683330885 43.1825905761829, 141.765106111277 43.1831961137631)) ^^http://www.opengis.net/ont/geosparql#wktLiteral