AN APPROACH TOWARDS A HARMONIZED FRAMEWORK FOR HYDROGRAPHIC
FEATURES DOMAIN
L. Bldzquez1, A. Pascual1, J. Rodriguez1, M. Poveda2
1 - National Geographic Institute, Spain
2 - Universidad Politacnica de Madrid
smas@fomento.es
Nowadays
geographic information is captured, managed and updated by different
cartographic agencies with variable levels of granularity, quality and
structure. This approach causes in practice the building up of multiple sets of
spatial databases with a great heterogeneity of
feature catalogues and data models. That means a coexistence of a great
variety of sources with different information, structure and semantic without a
general harmonization framework. This heterogeneity cause several and important
problems to link similar features, to search, to retrieve and to exploit data on web.
The
development of Ontological Engineering has been acknowledged to be the core
methodology for capturing and sharing semantics of geospatial information,
therefore, it is a key matter in the solution of current problems of geospatial
information. For that reason, the definition of a domain ontology becomes
necessary in the achievement of an easy accessibility and common structure of
data. That means to provide a certain structure of names, codes, attributes and
other associated represented characteristics being responsible for defining the
real world. Thus, in order to give an answer to users, we will hopefully
improve the structure of the world of classical cartography, computer-assisted
cartography, GIS (Geographic Information System) and SDI (Spatial Data
Infrastructure).
In this
paper we describe some characteristic of a domain ontology development process
in the hydrographic features framework. This ontology (HydrOntology) is a starting point to relate different feature
catalogues corresponding to the geospatial databases generated by diverse
cartographic agencies in Spain at national, regional and local level, from
1:1.000.000 national scale to 1:1000 local scale.
Moreover, hydrographic features have relationships with other knowledge areas. Therefore the HydrOntology model expands to different domains, such as the legal framework (international law), the geological domain (hydrogeology) and urban civil engineering (COST UCE Action C21, Towntology project). This fact enriches the ontological framework because it provides a gradual increase in knowledge and added benefit for geographic information users on the web.