メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.364845257127 43.0914660219403, 141.365167790707 43.0915120492083, 141.36583033428 43.0916100738858, 141.365721712382 43.091995828326, 141.365612256675 43.0923860780662, 141.365422846014 43.0931767901589, 141.365417029104 43.0932008669523, 141.364453214969 43.0930780032988, 141.363864853411 43.0930055119469, 141.363991938457 43.0925515432151, 141.3640117516 43.0924620286255, 141.364086338082 43.0921746123774, 141.364289903458 43.0913814097461, 141.364845257127 43.0914660219403)) ^^http://www.opengis.net/ont/geosparql#wktLiteral