Volume Calculation
To create a volume calculation check it out in Add measurements
Contents
Adjust the cut height
- Select the wanted inspection
- Adjust cut height with slider
Volume calculation is based on Digital Elevation Model (DEM) that has been generated or included alongside inspections. A DEM is a raster – i.e. a grid of squares – where each grid cell has a height value. You can see the density of the DEM grid and other detailed parameters in the volume calculation report.
How volume calculation works
Once you have drawn the area of interest for volume calculation the tool will find all inspections that intersect with the selected area. Next, you can adjust the wanted cut-off height by using the slider on the volume calculation tool. After changing the volume calculation parameters the tool will calculate
- Red area/Cut volume: the area and volume above the given cut-off value
- Green area/ Fill volume: the area and volume below the given cut-off value, and
- Empty area /Planar area N/A: the area where no elevation data was available.
If the area selection intersects with multiple inspections, the volume calculation process is repeated for every inspection and the total areas and volumes are summed up. Note that any overlapping inspections in the calculation area are included multiple times in the overall results. You can use the toggle switches for excluding or including inspection in the calculation.
Further details
The digital elevation models used by the system use the coordinate system of the respective inspection. Firstly, the selected calculation area is projected into the inspection’s coordinate system and the volume calculation is performed using that coordinate system. Lastly, the results are converted to metric values if necessary.
When the volume calculation has been completed, the calculation area on the map is also updated to reflect the area of the volume calculation.
