  A lot of information on the web is geographically referenced. Discovering and
retrieving this geographic information to satisfy various users needs across
both open and distributed Spatial Data Infrastructures (SDI) poses eminent
research challenges. However, this is mostly caused by semantic heterogeneity
in users query and lack of semantic referencing of the Geographic Information
(GI) metadata. To addressing these challenges, this paper discusses ontology
based semantic enhanced model, which explicitly represents GI metadata, and
provides linked RDF instances of each entity. The system focuses on semantic
search, ontology, and efficient spatial information retrieval. In particular,
an integrated model that uses specific domain information extraction to improve
the searching and retrieval of ranked spatial search results.
