Delete grid nodes inside polygon
From main toolbar, select Add a new polyline button then start draw the polyline by LMC and end by RMC (the polyline overlay the grid) as shown in Figure 1. In case, the polyline file is available from external source, the user can skip the drawing polyline steps and load the polyline file into the workplace.
- Select the Select object button from main toolbar, LMC on the polyline, it will be highlighted.
- LMC on the grid layer in the Layer Control (the selected polygon is still highlighted).
- Now RMC, a number of options will be displayed, select Delete Grid Nodes Inside the Selected Polygon to delete the grid points inside the polygon as shown in Figure 2
Delete grid nodes outside polygon
Apply from step 1 to 3 similarly to the Delete grid nodes inside a polygon above, in the step 4, select Delete Grid Nodes Outside the Selected Polygon to delete the grid points outside the polygon as shown in Figure 3
Figure 1 Add a new polyline.
Figure 2 Delete grid nodes inside a polygon.
Figure 3 Delete grid nodes outside a polygon.