メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.401780581771 43.7398356327087, 142.401819597027 43.7403436008087, 142.400526199336 43.7404156275448, 142.399243567646 43.7404798218516, 142.397795897821 43.7405709171635, 142.397766120576 43.740227717068, 142.397760288865 43.7400440448412, 142.397694350177 43.7395734330713, 142.39821357658 43.739538207142, 142.39936500306 43.7394701156749, 142.399578882328 43.7394678710255, 142.399645293312 43.7394671695352, 142.400432078671 43.7394153431304, 142.400981765506 43.7393833694106, 142.401730850407 43.7393472299055, 142.401780581771 43.7398356327087)) ^^http://www.opengis.net/ont/geosparql#wktLiteral