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| I have gridded my data set and created a contour map; however, no contour lines are displayed. What is wrong? |
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This condition has several possible
causes. Some are:
- The contour line levels are not within the gridded data range. Select the Contours layer in the Object
Manager. In the Property Manager, go to the Levels tab.
Make sure the Minimum contour and Maximum contour level
values are within the range of your gridded data. For example, a contour
map appears blank if there are 2 contour lines, at 0 and 100 while the
gridded data ranges from 20 to 80. Or, a contour map appears balnk if the
contour lines go from 200 to 400 while the gridded data ranges from 20 to
80. You can click the Reset Levels button to reset the levels for
the grid file back to their default values. This is useful if you've
replaced the grid file for a contour map with another grid file with
different Z extents.
- The grid file is not within the map limits. Select Map in the Object
Manager, and in the Property Manager go to the Limits tab. If
the check box for Use Data Limits is not checked, check this box and
click OK to reset the map XY limits to include all the data in the map.
If you have
checked both the contour levels and the map limits and still cannot see any
contour lines, please zip and email the SRF file to
surfersupport@goldensoftware.com.
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