Volume Contour - Introduction¶
For mass calculation between layers (models), it is common to use the integral method. This normally gives a more accurate result than the cross-section method. The cross-section method can be used as an independent control of the calculation.
The integral method is calculation of volumes between two layers. These can be physical layers in the form of strata (grid models) or theoretical layers in excavations and intersections. The data for physical layers (strata) are located on application layers. Application layers are described in more detail in the section Application Layers.
Two application layers that volumes can be calculated between
Calculation and Tools¶
The actual calculation takes place in the dialog for excavation. This is common for both mass calculation between layers (volume contour) and mass calculation of theoretical interventions (excavations).
The polygon (volume contour) that we use to limit the calculation can be copied from an application layer, for example the boundary contour of a triangle network, or digitized directly on the screen via the dialog.
Typical Use Cases for Mass Calculation Between Layers¶
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Mass extraction and filling
Volume calculation of cutting and filling masses for settlements per month. Measure new layers gradually as the project progresses. Can then calculate volumes in relation to the previous month or in relation to the original terrain layer. -
Waste filling and landscape changes
Here you can have a description of how the terrain should look after the terrain changes have been carried out. You should then be able to calculate volumes of remaining, of change since the previous measurement and total masses from the original terrain. -
Precipitation and snow volumes
You know the catchment area, you have knowledge of precipitation volumes or snow masses in the area either in the form of isolines or relative heights. By creating fictitious strata, you can calculate volume between these. -
Mass depot (piles)
Here we must know the terrain before depositing masses. Measure the piles, that is tops, any cutting lines between tops, boundary contour at the bottom, etc. and then calculate volume. -
Water reservoirs
You know the bottom of the reservoir, for example from sounding. Then create a polygon with the desired height that at least covers the entire reservoir in plan view. Can then calculate volume between reservoir and polygon. Furthermore, you can choose to calculate and document at given intervals, for example all regulated heights from 0 to 30 meters, with a height interval of 10 cm. -
Simple excavation
In this case, the data basis in the application layer is not measurements, but constructed lines. An example of using the method is described in the section on simple excavation.
Additional Information¶
See the section Integral Method for a more detailed description.
See example collection for implementation: