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Introduction to mass calculation

Available calculation methods

In Gemini Terrain, we have three methods for calculating areas and volumes.

The methods in Gemini Terrain are:

  1. Cross-section method
  2. Integral method
  3. Tetrahedron method

The cross-section method is used for calculating quantities in an SFI model, while the integral method is used in excavation pits and intersections.

In addition, we can also calculate areas and volumes with the tetrahedron method. The starting point is irregular triangle networks in application layers, and the result will also be a triangle network.

Mass types

To calculate quantities, the program uses mass types. A mass type is, in short, a rule for calculating a quantity (m, m², m³), and the concept is the same for both cross-section and integral methods.

The program contains predefined mass types for roads, ditches, tunnels, and excavation pits. It is not possible to predefine mass types for all conceivable situations, but the concept of mass types is flexible so that we can adapt or define our own mass types as needed.

Further documentation

The following chapters describe the various calculation methods in more detail. The example collection also contains examples of using these methods.