Create by Terrain Model Colour Bands

Description

Create polygons or shapes representing discrete colour bands from a terrain model.

Access

Home / Tools / Create / Polygon / Straight / Terrain Model Colour Bands or
Home / Tools / Create / Shape / Terrain Model Colour Bands

Requirements

Terrain module
Existing terrain model with discrete colour banding.

Controls

Control

Description

Terrain Model

Insert the terrain model from which the colour banding will be used.

Merge and flatten

Do one of the following:

Clear the checkbox to create polygons for each colour band in each terrain model face.
Select the checkbox to merge the polygons created for each face if they share an edge and a colour. The resultant polygon is then flattened by giving the vertices the mid height of the source polygons.

Note:

Available only when creating polygons, and terrain model faces are coloured by Height (Banded).

Simple polygons

When Merge and flatten is selected, do one of the following:

Clear the checkbox to use a more precise method for creating polygons. These polygons can be viewed in 3 dimensions but the method may fail if the geometry causes self intersecting polygons or is to complex.
Select the checkbox to use a simplified less accurate method for creating the polygons. Only the external edge will be used to create the polygon (Polygons with holes are not created).

Note:

Available only when creating polygons, and terrain model faces are coloured by Height (Banded).

Notes

Simplified polygons should be viewed and exported in 2 dimensions only.
Simplified polygons display best with solid fill.
Simplified polygons are created in order of largest to smallest to give the appearance of holes.

Errors or Warnings

Error or Warning	Description	Solution
Failed to merge polygons. Consider creating shapes instead.	Polygon creation failed as invalid polygons would be formed.	Create shapes by terrain model colour bands, or create polygons using the Simple polygons method.