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> Thanks for the tip, I will try the add-on. Any idea what is causing the<br>
> distortion in the maps? It would interest me if it is a resolution issue<br>
> or the data itself ....<br>
><br></p>
<p dir="ltr">It's a function of the contour lines and interpolator. Contour lines are poor input for building DEMs because they have high density of input points along the line with no data between them. When the distance is too large some interpolator create sharp angle artifacts in the process. Other interpolators smooth the transition areas better. <br>
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<p dir="ltr">Mark<br>
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