メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.407784230309 43.7941669856533, 142.406578048482 43.7951832161969, 142.406001825293 43.794844660214, 142.40610395888 43.7947486726506, 142.404909445398 43.7940510388902, 142.40457814564 43.793826312419, 142.405723696804 43.7928678273555, 142.406746401759 43.7935166397041, 142.407784230309 43.7941669856533)) ^^http://www.opengis.net/ont/geosparql#wktLiteral