The threshold length of valley-fill method has similar significance of the grid interval of grid method.
The Figure 4 presents summit level map for the central region of State of Rio de Janeiro, Brazil, based on grid interval of 4 km (AIRES et al.
Along the scarp, some mega-landslide blocks are observed in the summit level map of the grid interval of 2 and 1 km.
The Figure 6 shows the summit level map of grid interval of 490 m using the updated topographic data of the Aster Gdem.
The summit level map of grid interval of 2 km shows a closed depression area.
The summit level map of 2 km of grid interval shows that its morphologic features are unlikely for a volcanic caldera.