Infrastructure Engineering - Research Publications

Permanent URI for this collection

http://hdl.handle.net/11343/347

Filters

2008 2
Reset filters

Settings
Statistics
Citations
Type: Journal Article × Start date: 2000 × End date: 2009 × Author: Rajabifard, Abbas × Subject: geo-service ×

Search Results

Now showing 1 - 2 of 2
  • Item
    Thumbnail Image
    A formal ontological structure for semantic interoperability of GIS and environmental modeling
    Fallahi, Gholam Reza ; Mesgari, Mohammad Saadi ; RAJABIFARD, ABBAS ; Frank, Andrew U. ( 2008)
    Most of the environmental problems have an obvious spatial dimension and Geographic Information System (GIS) are widely used for solving environmental problems. Service oriented architecture in distributed computing environment with loosely coupled geoservices is a new approach for using GIS services in environmental modeling. The messages exchanged must follow a set of standard protocols which support syntactic interoperability, but do not address application semantics. This article proposes a layer-based ontology with new layers for describing geoservices. The paper gives an ontology of measurements for describing the input and output of field-based geo-services and a core ontology of geo-services containing the domain concepts related to geo-services. An upper ontology adds new general concepts to an existing ontology in order to make an agreement between geo-service developers and environmental modelers. The layer-based structure is the building block for discovering geo-services that support semantic interoperability in GIS and environmental modeling.
  • Item
    Thumbnail Image
    A methodology based on ontology for geo-service discovery
    Fallahi, Gholam Reza ; Mesgari, Mohammad Saadi ; RAJABIFARD, ABBAS ; Frank, Andrew U. ( 2008)
    Due to popular use of internet and fast progress of communications technology, the researches related to GIS in environmental models is being focused to use Geospatial Information System (GIS) in a Service Oriented Architecture (SOA). In this architecture, the geo service requesters can access the provided geo-services through the communication network by using client/server method. Effectiveness of the method depends on the existence of interoperability especially at semantic level. Lack of semantic interoperability makes obstacles for automated discovery of geo-services. The current article proposes a methodology based on ontology for discovering field-based geo-services. An ontological structure including the ontology of measurement theory, the core ontology of geo services and the upper ontology supports semantic framework for this methodology. In the other words, these ontologies provide required knowledge for describing ontologies of provided and requested geo-services. Sample ontologies have been built to test the implementation of the proposed methodology for discovering geo-services. In this regard, a geo-service discovery application has been developed by this research in order to implement a prototype of the methodology.