メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.365760043082 43.7468060031604, 142.365903836977 43.7468462919591, 142.365985099977 43.7468705402846, 142.366523851187 43.7470313614956, 142.363019644175 43.7485933714534, 142.36266615738 43.7481744131031, 142.362282051553 43.7477196890294, 142.363538882126 43.7471610586973, 142.364032224775 43.7469526251759, 142.364948406174 43.7465494306643, 142.365458610679 43.7467107068744, 142.365760043082 43.7468060031604)) ^^http://www.opengis.net/ont/geosparql#wktLiteral