23 January 2001 Filters cascade for automatic change detection
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It is very important to analyse terrain changes in order to have information to perform land management, especially in crowded area as Lombardia (north of Italy). The easiest way to individualise changes is to compare different age maps; this paper describes an automatic way to do this. Lombardia flat area, about 18000 km2, has been mapped in 1984 and 1991 in 1:10000 scale. 450 sheets compose the CTR (Cartography Technical Regional) map, each of them describing a 40 km2 area. In this way 1984-1991 change detection requires to menage 900 map sheets and it is clear that is indispensable to define an automatic way to data analyse. In the first part of the work the way to automatically extract civil and industrial areas from map have been defined. A math composition of the obtained spare maps (1984 civil coverage, 1984 industrial coverage, 1991 civil coverage and 1991 industrial coverage) gives as result a map of the coverage evolution (showed as 9 classes). In the second part of the work the 450 sheets of the evolution map are analysed in order to obtain areal parameters. The obtained parameters are the amount of each class as total area and percentage area for single square kilometre of Lombardia and for each one of the regional municipalities.
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Alessandra Colombo, Alessandra Colombo, Giovanni M. Lechi, Giovanni M. Lechi, } "Filters cascade for automatic change detection", Proc. SPIE 4171, Remote Sensing for Agriculture, Ecosystems, and Hydrology II, (23 January 2001); doi: 10.1117/12.413956; https://doi.org/10.1117/12.413956


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