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Reference > Style examples > Trend surface
Trend surface
You can use the gaussian fitting process with 3D data to put a trend surface through a set of spot-height values.
This can be a useful way to visualise a landscape given a series of discrete altitude values. Contours are drawn at the Z-tickmarks if style ‘contour’ is set, and if style ‘riser’ is selected, the risers are drawn from the surface rather than from the XY-plane.