Quadros, Clécio José Lopes de 
  
  
Morphologic Forms 
EN ridges 
  
CIEN E NUN — NUN NN 
100 0 1000 m 
Figure 4. Morphologic forms map 
In spite of the big irregularity of the relief, the relative altimetry values, gotten by DGPS together with 
the post-processing decimeter, the model generated seems to be faithful to reality. Being possible the 
visualization of the main forms. This is due to the alignment preferably transversal of the forms in relation to the 
profiles, and to the great quantity of sampled sites. 
Thiessen method showed to be useful on the analysis of the forms, indicating the presence and 
orientation of smaller ridges, not visible on the digital elevation model. 
6. CONCLUSION 
The small altimetry variability, the reduced scale, and the complexity of the ridges distribution were 
limiting parameters present at the beach ridges, and that could not be well characterized by the proposed 
method. However, the use of DGPS and spatial analysis techniques based on GIS showed potential for 
diagnostic and analysis of coastal environments, like beach ridges. 
ACKNOWLEDGMENT 
The authors thanks the APPA (Administracáo dos Portos de Paranaguá e Antonina) — CEM (Centro de 
Estudos do Mar) agreement, without whom this study would not be possible. Thanks are also due to the head of 
Marine Phisics Laboratory Dr. Eduardo Marone. 
  
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International Archives of Photogrammetry and Remote Sensing. Vol. XXXIII, Part B7. Amsterdam 2000.