Oliveira, Ronaldo Pereira de
EE a
1 : 75,000
Critical
Areas
Morphography
1 : 50,000
Limiting
Factors
Areas
to be
Revised
Figure 4. Conceptual model of terrain object classes integrating geoinformation to land environmental planning,
including purposed spatial analysis (DTM and Image Processing) to be evaluated.
conflicting classification. Still, in extremely high (EA) vulnerability class for highland areas there was a very small
difference around 0.1ha, showing that for those steeped slopes the DTM generation should be further refined. In low
lands environment this procedure did not bring any significant difference, matching precisely previous calculated areas
unless for areas with very high (MA) vulnerability class with a small difference of 0.4ha.
Further analysis has considered digital image processing functions for supervised classification, providing means to
evaluate possible refinements for vulnerability assessment at low lands. Output results from final overlay phase were
International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000. 1079