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Terrain mesh is used to generate a topographical area mesh in a rectangular zone. The mesh helps to evaluate terrain, spot a survey's errors and prepare for generation.

Clicking Terrain mesh will open up an interface in which you can input desired mesh parameters.
The first step would be to Select terrain objects if that has not already been done. Once you select the survey indicating objects you will see this view with default values in it:

There are several options on how you can customize your mesh generation:

1. Automatic table and Custom table

Automatic table allows the user to input the Inclination start value (1.), Inclination end value (2.) and Inclination value range (3.).
Automatic table with default gradual coloring for each angle range will be created on the left based on the inserted values (4).

Custom table allows the user to add or remove rows of the terrain mesh coloring table and input values of their own (see example below).

2. Color coding angle ranges

Changing the color of each angle range is also available on both Automatic table and Custom table - just click on the color box and choose - don't forget to click Confirm afterwards.

3. Mesh density

Mesh density slider defines the distances between the triangle centers that comprise the mesh.

Higher density will result in a more detailed mesh but will increase generation time and require more computing power to keep on AutoCAD.
Lower density will result in a less detailed mesh but will reduce generation time and requires less computing power.

Density value can by changed within the input box or slider handle.

After you define your mesh, simply click Generate terrain mesh and select the desired area in which mesh should be generated.

Once a mesh is generated, values are created in the Distribution column showing which ranges take up most of the mesh. This might not add to 100% in total if you have any ranges left out. 

If you would like to learn how to evaluate and troubleshoot terrain surveys with the terrain mesh tool, click here:

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