In this tutorial you will learn how to edit the various properties of the terrain in your designs. This tutorial assumes you have completed and understood Tutorials 1. If you have not, it is highly recommended you do so before starting this tutorial. At the end of this tutorial you will be able to:
- add ground tiles to your design
- create height specification points and spans
- edit and move existing height specification points,
- import terrain height data from survey CAD file.
Adding Ground Tiles
When you create a new design, there will only be a single ground tile measuring 100m across. Your design may need to span a larger area than a single tile. To expand the terrain area, left-click on the outlined "plus" squares adjacent to an existing ground tile.
Height Specification Points
For many designs the terrain topography is not completely flat, but has varying heights and gradients. You will need to model this to get accurate conductor sag and ground clearance. One of the ways you can set the terrain topography is using height specification points. You can place height specification points on the ground using the Terrain Tool To see how this tool works, follow the following steps:
- select the tool and left-click somewhere on the ground,
- this will place a height spec point on the ground where you clicked, it will look like a blue circle,
- as you move your cursor you will notice another height spec point under the cursor, joined to the first by a blue line,
- you can place down multiple height spec points in this way, using left-click, each will be joined to the previous by a blue line,
- right-click will finalise the set of height-spec points that you have placed,
- you should see something like this:
As you edit the heights of the height spec points, you will notice the terrain changes shape to reflect the new topography.
One very important thing to note is the interpolation of the terrain between height spec points. The terrain is exactly linearly interpolated between joined height spec points, along the blue lines. Elsewhere, the terrain is approximately interpolated based on the distance to nearby height spec points. This arrangement is targeted at the use case where you may have survey height data along a particular 1-dimensional slice of the terrain. In this case you will know the height and slope of the terrain along the given slice, which you can model using height spec points, but not elsewhere. The below image shows an example of a terrain topography generated from a few height spec points:
Editing Height Spec Points
Extending Height Spec Point Segments
Importing Survey CAD File
- profile height data - a single polyline in the XY plane, with the X dimension specifying the distance along the elevation slice, and the Y dimension specifying the height of the terrain at that point on the slice.
- 3D strips of elevation data - multiple polylines in XYZ space, with the Z dimension specifying the height of the terrain at the XY point on the terrain.
This completes this tutorial. We really value your feedback, queries, suggestions, send them all our way!