メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.346511553181 44.4866428171004, 142.346021304383 44.4865349133975, 142.345713172233 44.4864549089712, 142.345945572898 44.4859473399684, 142.346246573395 44.4860236233132, 142.346731394564 44.4861464701235, 142.346511553181 44.4866428171004)) ^^http://www.opengis.net/ont/geosparql#wktLiteral