Creating a Cut/Fill Map : Softree Technical Systems Support

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Creating a Cut/Fill Map

Updated May 04, 2016


This article applies to:
  • Terrain 3D
  • Terrain Forestry
  • RoadEng Civil
  • RoadEng Forestry

To run this example you will need Terrain Tools® or RoadEng® Version 5 or higher.

Terrain allows you to save data in a Regular Grid format. The Regular Grid format is a an array of points regularly spaced in plan (XY plane). A Z-value is associated with each point.

The grid is defined by:

  • Origin X and Y
  • Widths X and Y
  • Number of node in the X and Y directions
  • Azimuth (measured from north clockwise)


Figure 1: Grid Definition

Several options exist for computing the z-value including surface elevation and difference between surfaces. In this example we will save a grid using difference between surfaces to create a cut/fill map.

The example starts with 2 existing TIN surfaces:

  • OG.ter = original ground surfaces
  • Excavated.ter = post excavation surface

Creating a Grid File

1. File | Open. Select Excavation.ter. Press Open.

Figure 2: Excavation.ter surface after excavation

2. File | Open. Select OG.TER. Press Open.


Figure 3: OG.ter – original ground surface

3. Choose menu File | Save As. Set the file name to CutFillMap.ter and set the save as type to Regular Grid (*.ter).

Figure 4: Save As dialog box.

4. Choose menu File | Save As. Set the file name to CutFillMap.ter and set the save as type to Regular Grid (*.ter).

5.When the Regurlar Grid options appears set the parameters as shown in the dialog below The location of surface B (Excavation.ter) will depend on where you saved the example files.

Figure 5: Regular Grid Export options dialog box.

After pressing OK the CutFillMap.ter will appear in a new instance of Terrain similar to that shown in Figure 6.

Figure 6: CutFillMap.Ter.

To complete this example try calculating a terrain model and shading (or contouring) the result. Figure 7 shows a color coded map of cut/fill depths.

Figure 7: Color coded cut/fill map

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