メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.905435232464 43.472985090551, 141.90573696487 43.4739958536586, 141.904901105 43.4741217590389, 141.904885853488 43.4740658767735, 141.904626175308 43.4731037957415, 141.904670849988 43.4730972489982, 141.904352013824 43.4717600559581, 141.904933078827 43.4716655622762, 141.90502228037 43.4716522223248, 141.905186263839 43.4722224131082, 141.905435232464 43.472985090551)) ^^http://www.opengis.net/ont/geosparql#wktLiteral