One of the most common traditional land survey methods to create a topo over an area is to run parallel transects at set intervals that capture the XY & Z coordinate which are then used in your surface creation. The Rectangular / Triangular Point Grid tools allow you to simulate this same process virtually, allowing for easy creation of hundreds to thousands of points from your drone survey data.
The Rectangular / Triangular Point Grid tool works by placing points in either a Rectangular or Triangular pattern, with a constant X & Y spacing between every point based off of your input Grid Size, and the Z from the underlying drone data.
The final output of Rectangular / Triangular Point Grid is a Multi-point item containing all of your points. You can find the Rectangular / Triangular function as part of the Point Grid tools within the Home tab of Virtual Surveyor.
- Create a Boundary around the area you wish to run the Rectangular / Triangular Point Grid and then select it.
- Within the Home tab Navigate to the Point Grid section and choose Rectangular / Triangular in Type.
- Set a Grid Size parameter.
- Set an Azimuth direction.
- Click on the Point Grid button to start generating Rectangular / Triangular points.
- A progress bar in the bottom left of the software will display and points will be created on your terrain.
- Your Rectangular / Triangular points will display in the Viewport and will be contained within a Multi-point item
- Type: Choose Rectangular or Triangular to set the pattern that is used for your Point Grid.
- Grid Size: Sets the spacing of your grid type. Every point will be equidistant according to the set Grid Size.
- Azimuth: Sets the direction of the point grid pattern with 0° being true North, and increasing degrees rotating the direction from there clockwise.
- Both Rectangular & Triangular types will place points with equal spacing but in their respective patterns.
- It is commonly used in combination with your other survey items (breaklines & field shots) in your surface creation.
Tips and Tricks
- Your Grid Size can typically easily be half of your typical field collection spacing. For instance if you were doing a topo and your traditional survey would have been collected at 50ft (15.24m) spacing, you can usually use 25ft,(7.62m) or even 15ft (4.57m).
- If you require more detail in your contours you can decrease the Grid Size.
- Keep in mind, the more you decrease your Grid Size, the more points you need to clean, and the larger your data set becomes.
- Remember, you can always use any Point Grid tool over small subsets of your whole project. If you have areas where Low-pass Points would work best, use them there, and other Point Grid types in the other areas where it may not be suitable.