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TerraModeler User Guide

Navigation: Tool Reference > Managing Surfaces > Edit pulldown menu

Modify elevations

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Modify elevations

Modify elevations command changes the elevation values of a surface model by using a mathematical equation. The process computes a new elevation value for each point of a surface model.

The old elevation of a point can be used in the equation as variable Z. The equation is actually a C language expression. You can use any mathematical functions that MDL recognizes. Valid expressions include functions, such as sin(a), cos(a), tan(a), exp(a), log(a), log10(a), pow(a,b), sqrt(a), ceil(a), fabs(a), and floor(a), where a and b are floating point values.

To modify elevation values:

1. (Optional) Select a surface model from the list in the Surfaces window.

2. Select Modify elevations command from the Edit pulldown menu.

This opens the Modify Surface Elevations dialog:

modify_surface_elevations

3. Select a Surface to modify elevations. If a surface was selected in step 1, this surface is selected in the dialog.

4. Define the mathematical equation.

5. Click OK.

This starts the calculation of the new elevation values. Depending on the size of the surface the process may take some time. Use the Update Displays tool or another CAD tool for updating a view in order to visualize changes in visible surface displays.

Setting

Effect

Surface

Name of the effected surface model.

Use fence

If on, only points Inside or Outside a fence are effected.

Z =

Mathematical expression that is applied to surface model points in order to calculated new elevation values.

Surface Z

The button opens the Append surface dialog which lets you select a surface model. The elevation values of this surface are then used in the mathematical expression.

TerraModeler User Guide   01.01.2024   © 2024 Terrasolid Ltd