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The paper has two main aims. Firstly, to postulate a physical geodatabase model of a geomorphological information system based on the already existing logical geodatabase model. Secondly, to define processes of geomorphological analysis based on the physical geodatabase model. The structure of the physical model follows the logical model and is divided into three parts: adopted layers (hydrology, geology, topography and others), basic layers (elementary forms, digital elevation model and derivatives, documentation materials, genetic groups of landforms, morphodynamic phenomena, basin based features and geomorphic network) and special layers (morphostructural analysis, comprehensive geomorphological analysis and so on). The geodatabase modelling methodology was used for developing the physical geodatabase model. The geomorphological analysis is based mainly on the layer of elementary forms (defined according to their morphology and morphometry) and the derived layer of morphogenetical forms (determined by genesis of landforms). The traditional methods of geomorphological mapping and also more recent concepts of geomorphological analysis were used. The concept is presented in the context of research in the surroundings of Prášilské jezero (lake) in the Šumava (Mts.). ESRI products were used to carry out the project. This paper has been created in the framework of the Czech-Slovak Intergovernmental Scientific-technical cooperation project: ‘Geomorphological information system as a base of environmental applications’ number 116. Research has been supported by the grant of the Czech Academy of Science of the Czech Republic number KJB300460501 (PM), by the Research Plan MSM 4977751301 (Ministry of Education, Youth and sports, Czech Republic) (KJ) and by the grant of the Scientific Grant Agency of the Ministry of Education of the Slovak Republic and the Slovak Academy of Science (1/1037/04) (PM and JM). Introduction Geomorphological Information System (GmIS) as a special type of geographic information system (GIS) focused on collecting, maintaining and analyzing geomorphic information is an excellent tool for geomorphological analysis. This idea has been mentioned by several authors (e. g. Barsch, Dikau 1989, Dikau 1992, Minár 1996, Kusendová 2000, Voženílek et al. 2001). However, some problems remain which we would like to solve. One of the goals of the paper is to present an example of implementation of geomorphological analysis into Geomorphological Information System. An example from the surroundings of Prášilské jezero (lake) in the Šumava Mts. (the Czech Republic) is presented here. Description of the creation of the physical model of a geomorphological database is the other goal. This model is a necessary condition for implementing the geomorphological analysis in GmIS environment. However, before this, it is necessary to introduce a logical model of GmIS database.

Geomorphological information system: Physical model and options of geomorphological analysis