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  • Advanced Volume calculation in 3Dsurvey

Advanced Volume calculation in 3Dsurvey

Advanced Volume calculation in 3Dsurvey

Discover all the possible ways to calculate volume in 3Dsurvey. First step is always calculating regular grid mesh.

Preparing the Regular Grid Mesh (DSM)

The first step in volume calculation is creating a regular grid mesh (DSM). To do this, click MESH in the toolbar and select Calculate New Regular Grid Mesh. Choose the point cloud and the appropriate classes if the point cloud is classified. Then, set your grid cell size, hole filling mode, and smoothing cell size, usually using the default settings. Click Calculate to generate the DSM.

Volume Calculation: Selecting Areas for Calculation

You can select areas for volume calculation in two ways:

  • Using the Select Tool: Click Select and use left mouse clicks to circle the desired area. Right-click to confirm.
  • Using CAD Data: Alternatively, you can use CAD data, either drawn in the CAD tab or imported. Go to CAD in the toolbar, click Load CAD, and select your data.

Initial and Final Surface Methods

There are two ways to define the initial and final surface for volume calculation:

  1. Using 1 DSM with Interpolate Surface: Use one DSM and set the initial surface as an interpolated surface.
  2. Using 2 DSMs: One DSM represents the initial surface, and the other represents the final surface, commonly used in before-and-after scenarios, like when measuring material removal.

Calculating Volume Using the Select Tool

In a basic example, such as calculating the volume of a gravel pile:

  1. Select the area by clicking Select and circling it.
  2. Choose Interpolate Surface as the initial surface and the generated DSM as the final surface.
  3. Click From Current Selection and calculate the volume. The results will show Fill, Cut, Total, 3D Area, and 2D Area.

Calculating Volume Using CAD Data

If you have CAD data:

  1. Go to the Mesh tab and click Calculate Volume.
  2. Set the initial surface as Interpolate Surface and the DSM as the final surface.
  3. Click From CAD and select the closed layers representing the volume.

Using 2 DSMs for Volume Calculation

For projects involving changes over time:

  1. Generate a DSM before a change (e.g., a pile of gravel) and save it.
  2. Generate another DSM after the change (e.g., after the gravel is removed).
  3. Load both DSMs and select the area to calculate.
  4. Choose the before mesh as the initial surface and the after mesh as the final surface.
  5. Click Calculate Volume.

Reviewing Volume Results

All calculated volumes are saved in the Volume tab, where you can show, hide, or edit them. You can view Fill, Cut, Total, 3D Area, and 2D Area. Hover over volumes to see detailed values for specific areas.

These are the primary methods for volume calculation in 3Dsurvey, covering both single and comparative surface analysis. For further support, feel free to visit the 3Dsurvey forum or contact the support team at [email protected].

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