Two-point Interpolation

Generate new Spot Levels

The Two-point Interpolation tool enables you to generate a new Spot Level related to/dependent on two existing Spot Levels.

Interpolate child Spot Level

To use Two-point Interpolation:

  • Go to:
    • LAND4/Group Palettes/Show Spot Level Palette, or
    • LAND4 Palette/Spot Levels
  • Then either:
    1. press 2 Point Interpolation.
    2. select two Spot Levels.
    3. Place the new, interpolated Spot Levels on plane.
    4. To exit tool, press Esc.
  • Or:
    1. select two Spot Levels.
    2. press 2 Point Interpolation.
    3. Place the new, interpolated Spot Level on plane.
    4. To exit tool, press Esc.
Spot Level Palette/2 Point Interpolation


Interpolated children Spot Levels are dynamic objects holding dynamic relations to their parent Spot Levels.

Changes to parent spot Levels

If you change the z-value or x,y-position of one or both parent Spot Levels, their interpolated children Spot Levels will be updated accordingly.

Changes to child Spot Level

If you move Children Spot Levels their values will be re-interpolated based on their position in relation to their parent Spot Levels.

NB! Since the elevation of a Child Spot Level is interpolated, you cannot change it manually. Not unless you break the dependency.

Two-point Interpolation. The new, interpolated Spot Level is marked with blue. The dependency lines point towards the parent Spot Levels.

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