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Mass Type

Use this dialog to define mass types for roads, intersections, and excavation pits.

Where do I find the dialog?

On the toolbox, select the SFI Properties... icon and the Mass Types tab, then choose Create Mass Type...

Using the dialog

The principles for defining a mass type are the same for the cross-section method (used for roads and trenches) and the integral method (used for intersections and excavation pits). A mass type contains a set of parameters for calculating a quantity.

Standard Codes

You can associate a standard code with the mass type, either a process code or an NS3420 code. The list of process or NS3420 codes is available depending on which calculation standard is selected under the Road Model tab.

The program retrieves the codes from MetadataNor.json in the sys folder. There is no link to the descriptions of the NS3420 codes. The NS3420 standard can be ordered from Standard Online AS's website.

Contract Posts

If you have checked Use contracts in the Gemini Terrain Settings... dialog - Project - Contracts, the contract post code field becomes active. You can choose between Gemini Connected or a local contract. For a local contract, contract post codes must be imported before they are available in the project. When you use contract post codes, the program automatically retrieves the standard code from the contract post code and places it in the standard code field. If you are connected to a contract via Gemini Connected, you can view the full contract post description for the selected post by clicking Info to the right of the contract post code.

Scaling and Unit Conversion

Scaling factor allows you to scale the mass to a percentage of the total mass by entering a scaling factor. The default scaling factor is 1.0.

Unit conversion makes it possible to enter a factor for converting the mass from, for example, m³ to tons. Custom units are entered directly in the To unit field.

Defining a Mass Type

For the cross-section method, it is recommended to define the mass type in the cross-section view, not in the plan view. By having the dialog and the cross-section view side by side, it is easier to see which layers should be included in the mass type.

When you define the rules for a mass type, the procedure is the same for different mass types, but the choices vary depending on which calculation method you select. Below is the procedure for Volume.

Procedure

  1. Select Create Mass Type... in the horizontal list field for mass types.
  2. Enter a description for the mass type (user-defined mass types are assigned IDs from 100 and up).
  3. Optionally select a code (standard code or contract post code). This is not required to calculate the quantity.
  4. Select calculation type Volume.
  5. Select the relevant From layer and click Add >>. Layers can be selected either from the Layer list or by choosing Locate... and marking one or more layers directly in the profile. Double-click the layer or right-click and select Edit... if you want to set advanced settings. Check Highest or Lowest if you have multiple from layers.
  6. Select the relevant To layer and click Add >>. Layers can be selected either from the Layer list or by choosing Locate... and marking one or more layers directly in the profile. Double-click the layer or right-click and select Edit... if you want to set advanced settings. Check Highest or Lowest if you have multiple to layers.
  7. Click OK. The program calculates the mass type if the layers exist in the profile.

Info

You can read more about mass types in the user documentation.