This chapter was therefore to assess the accuracy of four different DEMs by comparing the morphometric data obtained from the automatic vectorization of the drainage network of the River Buranhém watershed with that generated by manual vectorization and, based on this comparative analysis, determine which of the DEMs is most suitable for performing automatic vectorization of fluvial networks and morphometric characterization of watersheds and which geoprocessing techniques can be used to optimize results. http://backupbooks.com.br/index.php?route=product/product&product_id=60