This work describes some of the results of the EU funded project called "Geo-environmental dynamics of Pantanal-Chaco: multitemporal study and previsional modelling" which is developed by Italian, Portuguese, Brazilian and Paraguayan partners. The Pantanal-Chaco is a swampy area belonging to Brazil, Bolivia, Paraguay and Argentina, about 140.000km2 wide, threatened by the effect of anthropic activities. In this project, the development of work methodologies and standards to be followed by GIS (Geographic Information System) and Remote Sensing analyses by all the partners in order to carry out different geo-environmental multitemporal studies is one of the fundamental goals. These methodologies and standards should allow an easy updating of data and elaboration by merging and comparing the results of the tasks developed by different partners. The studied area for this work is the region of Rio Verde do Mato Grosso, which is located at the eastern border of the Pantanal Matogrossense (Fig. 1). Changes in the land cover, due to anthropisation occurred in the last two decades, are clear in this area. This work describes the main processes standardised in order to evaluate these environmental changes and connected effects in surrounding areas (summarised on Fig. 2), which are: digitisation of cartographic data (Fig. 3) and development of related GIS data banks (Fig. 4), analysis of remote sensed data with development of related land cover GIS data banks and multitemporal GIS analysis and evaluation of these data (Fig. 5). The use of CORINE land cover legend, with its appropriacy is suggested (CORINE, 1992). And some preliminary results are commented (Figs. 6 and 7). At present all the methodologies here described and tested are applied to the whole Pantanal-Chaco area in the frame of the above mentioned EU project. The resulting methodology could be useful in other parts of the word, including Europe.

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