Contour Options

Contour options define symbology settings for contour lines, such as level, coloring, line style, and line weight for the different contour types. They can also limit the contour display to specific domains or an elevation range, define the minimum areas for closed contours, or influence the way of contour line generation.

To define contour options:

  1. Select Contours command from the Options pull down menu in the Display contours

The Contour options dialog opens:.

Contour Options

Contour Options

  1. Define settings and click OK.
Contour option: Effect:
Color by Contour line coloring method:

•     Contour type – different colors according to the type of the contour line.

•     Elevation – a coloring scheme is used for coloring contour lines according to their elevation value.

Colors Color scheme for coloring contours by their elevation value. The color scheme is defined using the Define button. See Creating a coloring scheme of discrete colors for information about how to create a coloring scheme. Only active if Color by is set to Elevation.
Minor Level, color, line style, and line weight for minor contours of hills/depressions.
Basic Level, color, line style, and line weight for basic contours of hills/depressions.
Major Level, color, line style, and line weight for major contours of hills/depressions.
Only selected domains If on, contours are only drawn for domains for which the Draw contours option is switched on. See Define Domains tool for more information.
Only elevations If on, contours are drawn only for the given elevation range.
Minimum area A closed contour line is not drawn, if the enclosed surface area is smaller than Minimum area. Separate settings for Hills and Depressions. Helps to leave out unnecessary detail.
Build complex chains If on, contours are drawn as complex chains or as complex shapes.
Smoothing If on, contour vertices are slightly adjusted to produce smoother lines. If off, contours pass through triangle edges at mathematically correct positions which may result in jagged contour lines.
Thin by removing points if If on, some of the computed contour vertices may be left out. This helps to minimize the design file size when creating contours for large surface models.
Distance A vertex can be left out if the distance between the previous and the next remaining vertex is smaller than this value. Only active if Thin by removing points if is switched on.
Deviation A vertex can be left out if it is closer than this distance value to the line segment connecting the previous and the next remaining point. Only active if Thin by removing points if is switched on.
Turn angle A vertex can be left out if the contour direction changes less than this value at the vertex location. Only active if Thin by removing points if is switched on.

To modify existing contours use the Modify Contour Symbology tool.

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