メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.375276070746 43.7660158537657, 142.375571851378 43.7665645691855, 142.374042597136 43.7670062039595, 142.373733802835 43.766469963668, 142.373437752552 43.7659352572277, 142.373451667246 43.7659313394657, 142.374980347991 43.7654874613246, 142.375276070746 43.7660158537657)) ^^http://www.opengis.net/ont/geosparql#wktLiteral