World Academy of Science, Engineering and Technology
Existing methods of data mining cannot be applied on spatial data because they require spatial specificity consideration, as spatial relationships. This paper focuses on the classification with decision trees, which are one of the data mining techniques. The authors propose an extension of the C4.5 algorithm for spatial data, based on two different approaches join materialization and querying on the fly the different tables. Similar works have been done on these two main approaches, the first join materialization, favors the processing time in spite of memory space, whereas the second querying on the fly different tables-promotes memory space despite of the processing time.