メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.370746278631 43.8140756306338, 142.37071305999 43.8140424553726, 142.370128332305 43.8144785840188, 142.370062346804 43.8145409567402, 142.368264900755 43.8135235782176, 142.368756204096 43.813176179543, 142.369134161658 43.8129017129779, 142.369566805565 43.812617273006, 142.371115037072 43.8137681327644, 142.371142445362 43.8137912227583, 142.370746278631 43.8140756306338)) ^^http://www.opengis.net/ont/geosparql#wktLiteral