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 X, Y, & Z coordinates that are then used in your surface (TIN) creation. The Rectangular/Triangular Point Grid tools allow you to simulate this same process virtually, allowing for easy and fast 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.
Quick Usage Guide
- 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
Rectangular/Triangular Grid Tool Settings
- 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.
Grid Tool Examples
Rectangular and Triangular Grid Patterns
- Both Rectangular & Triangular grid types place points with equal spacing in their respective patterns.
Grid Sections with Breaklines
- 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 or 15m spacing, you can usually use 25ft or 8m or even 15ft or 5m for a more detailed surface with excellent results in Virtual Surveyor.
- 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.