Terrain analysis
Inspect terrain profiles, regions, slope, runoff and cut/fill comparisons.
Terrain Analysis Tools — Slope, Drainage, Cut/FillTerrain analysis describes the elevations in the current model. Profiles and regions sample the surface, slope shows its local steepness, and Compare shows cut and fill relative to the existing baseline. Results depend on source coverage, resolution and the current proposed changes.
Read a profile
Open Analyze → Profile, then draw a line over the terrain. Use Enter or right-click to finish; Esc cancels the unfinished profile. Select the profile to inspect its sampled elevation chart. A terrain profile is a measurement of the surface; it is separate from editing a volume point’s cross-section curve.
Inspect a region
Choose Region, draw a polygon with at least three points and finish it. The region reports available area, volume and elevation statistics. Use Enter or the enabled finish action to retain the region. Esc cancels and discards an unfinished region, after clearing active numeric input or references if needed. Check which surface is being inspected.
Read slope and display overlays
Choose Slope to place a slope reading. Open Display for independent Contours, Slope, Aspect and Runoff overlays. Runoff is derived from the terrain; it is not a rainfall, pipe-capacity or flood-safety certification.
Compare existing and proposed ground
Choose Cut/Fill, or switch the surface view to Compare. The comparison shows a cut/fill legend and earthwork summary. Selecting Cut/Fill again returns to Proposed. This action changes the comparison view rather than drawing a cut/fill polygon.
Interpret the quantities
Review the imported baseline and active modifiers before using quantities. Grid spacing and displayed decimal places do not establish measured survey accuracy. Missing or unavailable source terrain must be resolved before treating comparisons as complete.