MAGNET Collage: Extract Contours

Contours can be extracted from a TIN surface. Two available ways to activate the functionality:

1. Right-click in Contours folder on the Workspace window
2. Select Contours on Tools tab from top Ribbon

• Click Choose to open surface selection dialog.
• Select the surface from the list, then click OK
• Set contour settings:

  • Min Height: Minimum height which contours will be calculated

  • Max Height: Maximum height which contours will be calculated

  • Interval: Select the interval for each contour to be calculated

  • Base elevation: Contours are created at a specific interval from the base elevation by lower than max height on the upper side and by higher than min height on the lower side.

• Set filter settings

  • Minimum length: Minimum length for each contour, all  contours with shorter length will be discarded

  • Simplify polyline: Option to simplify extracted contours

  • Simplification threshold: Maximum perpendicular distance from used polyline to determine whether to include the vertex.

• Click OK to extract contours.