メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((143.139635601945 42.7076127643215, 143.139231973545 42.7078045289433, 143.138462279913 42.7079802778229, 143.138374846936 42.707848025334, 143.137064364917 42.7060058686117, 143.137046556802 42.7059809680917, 143.137643012167 42.7058294979587, 143.138410321565 42.705682186991, 143.139709658198 42.7074494388858, 143.139557361579 42.7074832548116, 143.139635601945 42.7076127643215)) ^^http://www.opengis.net/ont/geosparql#wktLiteral