Gradient Interpolation
Gradient Interpolation Tool
With the Gradient Interpolation Tool, elevations of your interpolated children Spot Levels are automatically calculated based on:
- the position of a parent Spot Level, and
- a fixed fall gradient.
Start Gradient Interpolation
To use Gradient Interpolation:
- Go to:
- LAND4/Group Palettes/Show Spot Level Palette, or
- LAND4 Palette/Spot Levels
- Choose reference parent Spot Level.
- Press Gradient Interpolation button.
- Enter Fall Percentage value in Fall Palette.
- Place new, interpolated children Spot Levels in optional directions.
- To exit tool, press Esc.

Fall Gradient
The Fall Percentage value entered in the Fall Palette can be:
- positive = the z-value of the interpolated children Spot Levels will decrease the further away from the parent Spot Level they are placed.
- negative = the z-value of the interpolated children Spot Levels will increase the further away from the parent Spote Level they are placed.
Positive Fall Gradient
When a positive Fall Percentage is set in the Fall Palette, the reference parent Spot Level will be the model’s highest point.
The height values of the various interpolated children Spot Levels will be inversely proportional to the distance from the parent Spot Level.
2D View

3D View

Negative Fall Gradient
When a negative Fall Percentage is set in the Fall Palette, the reference parent Spot Level will feature the lowest z-value of the model.
The height values of the various interpolated children Spot Levels will be directly proportional to the distance from the parent Spot Level.
2D View

3D View
