Option

Description

Surface to contour

Select the surface whose line model must be used to generate contours.

Contours by interval or Single contour

Select either Contours by interval and enter the vertical interval between successive contours; or select Single contour and enter the height of the contour to be generated. Single contour is useful in situations where you require a contour at a specific height, such as for a dam water level or a 50 year flood level.

Use exclusion polygons (Polyfences)

Select this checkbox to use predefined PolyFences that prevent contours passing through certain areas of the model i.e. over water surfaces.