メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.39845682294 44.1794507646158, 142.397196210986 44.1792501613088, 142.396020195352 44.1790536208928, 142.396301536646 44.1780935153329, 142.396459760319 44.1775591900401, 142.396478967494 44.1775622058548, 142.396520856709 44.1774188825272, 142.397720379147 44.1776027489325, 142.398950740339 44.1778016635686, 142.398814893394 44.1782314547459, 142.398739768852 44.1784872578132, 142.39845682294 44.1794507646158)) ^^http://www.opengis.net/ont/geosparql#wktLiteral