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Delete Polyline: Selecting this option will remove the polyline.
Delete Grid Elevations: Selecting this option to remove the elevation of the nodes which are inside of the polyline. Steps to use this option are described below.
Interpolate Grid Elevations:
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Figure 5 Select Layer form.
Delete Grid Elevations
Suppose that there is a grid with the node's elevation shown (Figure 6). How to show grid elevation is described in .
Now we draw a polyline that is over the grid. After drawing a polyline, LMC on that polyline will be highlighted (It turns red). Then select the grid layer in the Layer Control by LMC on that layer. Next, move the cursor near to the polyline and then RMC to display options as shown in Figure 7.
RMC on the grid layer then select Show Labels/Bottom Elevation to update the node's elevation. As a result, the elevation of nodes that are inside the polyline is deleted and displayed with the NaN label as shown in Figure 8.
Anchor Figure 6 Figure 6
Figure 6 Grid with node's elevation shown.
Anchor Figure 7 Figure 7
Figure 7 Delete Grid Elevation option.
Anchor Figure 8 Figure 8
Figure 8 Grid Node's Elevation inside polyline deleted.