メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.307095922546 44.3696632961618, 143.304005833296 44.3678692236672, 143.301683575989 44.3665325582534, 143.3056720097 44.3630733951651, 143.306457040099 44.362377381848, 143.310975436206 44.3652152933722, 143.310785317377 44.3655647596565, 143.310532609521 44.3661504266262, 143.310371931232 44.3665293264245, 143.310178064756 44.3668399441327, 143.310037584161 44.3670128122384, 143.309943586851 44.3671108932939, 143.308306449587 44.3685757646651, 143.307095922546 44.3696632961618)) ^^http://www.opengis.net/ont/geosparql#wktLiteral