Abstract
This paper presents the structure and contents of a hydro - geological GIS database that stores hydro – geological data and constitutes the basis for processing and extracting spatial and non spatial data. The geodatabase contains information on hydrology, hydrography, hydrochemistry, geology, topography, land use, protected area, administration as well as the maps that were produced using the data from the base. Additional data that related to hydrogeological study of the lakeside area located at the NW part of lake Trichonida and DEMs are also included at this database. Then a part of these files were used to make hyper- links whose objective was to give direct access to tables of precipitation and chemical data. With the SQL, various queries have been set in order to lead to the data retrieval. This hydrogeological database is implemented within a GIS (geographic information system) framework coupled to a Relational Database Management System (RDBMS) as a file geodatabase (ESRI format) GIS technology. At this point must be emphasized the dynamic nature of the database as well as provide support for a multiuser environment. The structure of the hydro – geological database presented at this paper is exemplified for a study site around Aitoloakarnania in Western Greece.
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