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The Contours dialog lets you change the way TPC draws contours for a surface.
Major and Minor
The major and minor contour lines have their own settings and are grouped together in this dialog.
Draw
Turn on this option to draw the contour lines.
Label
Turn on this option to label the contours. Labels are not drawn if the lines are turned off.
Interval
Set the contour interval. A contour line will be created at each interval (i.e. an interval of 2 creates contours at 2, 4, 6, 8, 10, etc).
Contour Labels
Decimals
Specify the number of decimals to use for the contour labels.
Label Interval
Specify the spacing of the contour labels. To increase the space between the labels, increase the interval.
Enter 0 to draw one label for each contour and place it as close to the start of the contour line as possible. Labels are moved farther into the contour if needed in order to find a contour segment that is long enough to hold the label.
Restrict Elevations
You can restrict the contours so that only the contours between minimum and maximum values (inclusive) are drawn.
Restrict contours to elevations
Turn this option On to restrict elevations between the Minimum and Maximum elevations, inclusive. Default = Off.
Minimum / Find
Specify the minimum contour elevation. This value is inclusive, meaning the contour for the minimum value will be included.
Maximum / Find
Specify the maximum contour elevation. This value is inclusive, meaning the contour for the maximum value will be included.
Contour Smoothing
Contour smoothing replaces the sharp angles where a contour line changes direction with smoothed transitions. See Contour Smoothing.
None or Curve Fit
Choose None to turn smoothing off (default). Choose Curve Fit to turn smoothing on.
Max Offset
Specify the maximum amount from which a smoothed polyline segment will vary from its corresponding unsmoothed segment. The default is 5 units.
Tension
TPC uses the tension value you specify to compute the amount of curvature when fitting the polyline. A tension of 1.0 (default is 1.0) guaranties that no smoothed polyline segment will vary by more than the Max Offset from its corresponding unsmoothed segment. A tension of 0.0 turns off smoothing. Tensions between 0.5 and 2 are common.
Max Angle
Specify an interior angle above which no curve fitting will be done. This allows TPC to skip very flat vertices in the polyline.
Save / Reset
•Choose Save to save the current settings as the default. Any surfaces you create after this will use these settings. All of the settings except the Description, Source and Border traverses are saved.
•Choose Reset to copy the default settings to this surface. The settings in the dialog will change to reflect the default settings but you will need to choose OK to apply them to the current surface.
Locked Surfaces
You may get warnings that your surface is locked, and your data is reverted to what it was originally.
Click here for more info about surface locking and how to change it.
Related Topics
Drawing Contours
Editions
Premium, Professional
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