After drawing polyline, an Overlay layer is added to the Layer Control panel, Select the Overlay layer then LMC on a polyline in the workspace, it will be highlighted in red. Next, RMC on that polyline to display options as shown in Figure Polyline Operation#Polyline Operation#Figure 1.
Properties: Selecting this option to set properties of the polyline as shown in Figure Polyline Operation#Polyline Operation#Figure 2.
Translate: Polyline contains points, each point has X and Y coordinates. Selecting this option to shift the polyline with a defined distancewill change the point's coordinates by adding a value to the original X and Y coordinates. As a result, the polyline will be shifted. After selecting this option, the Specify Distances form will pop up as shown in Figure Polyline Operation#Polyline Operation#Figure 3, enter distance two values in meters in the form (e.g -100,50) then click the OK button, the polyline will be shifted.
Rotate: Selecting this option to rotate the polyline. After selecting this option, the Specify Rotation form will pop up as shown in Figure Polyline Operation#Polyline Operation#Figure 4, enter a rotation angle in degree in the form then click the OK button, the polyline will be rotated. The rotation angle can be a positive or negative value.
Copy to a Spline Layer: Selecting this option will copy that polyline to other splines layer. After selecting this option, the Select Layer form will pop up as shown in Figure Polyline Operation#Polyline Operation#Figure 5. From the drop-down list, we can select <New Layer> or an available splines layer there.
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Interpolate Grid Elevations: Selecting this option to interpolate the elevation of the nodes which are inside of the polyline.
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Figure 1. Draw splines procedure.
Anchor Figure 2 Figure 2
Figure 2. Polyline Properties form.
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Anchor Figure 3 Figure 3
Figure 3. Specify Distances form.
Anchor Figure 4 Figure 4
Figure 4. Specify Rotation form.
Anchor Figure 5 Figure 5
Figure 5. Select Layer form.
Delete Grid Elevations
Suppose that there is a grid with the node's elevation shown (Figure Polyline Operation#Polyline Operation#Figure 6). How to To show grid elevation is described in , RMC on the grid layer then select Show Labels/Bottom Elevation option.
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 Polyline Operation#Polyline Operation#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 Polyline Operation#Polyline Operation#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.
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