A resolution reduction method for multi-resolution terrain maps

Abstract

Figure 1. A landform rectangular dissection (heights in meters)(left), its corresponding landform octgrid (center), and a relation between threshold values (height defferences) for cell unification (x-axis in meter) and cell numbers (y-axis) with the octgrid and quadtree methods for a terrain map of Riva del Garda in Italy (made from NASA SRTM-3).