メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((136.829038716757 35.4069063114772, 136.827590627446 35.4070487509243, 136.82600625156 35.407204522035, 136.826484804859 35.4057229984547, 136.826674504337 35.4057439519523, 136.827382931631 35.4056663579311, 136.829184478346 35.4054689177809, 136.829186939738 35.4057875821493, 136.829038716757 35.4069063114772)) ^^http://www.opengis.net/ont/geosparql#wktLiteral