Parameter Changes

If the initial parameter values that are set for a heading are not the same for the entire length of a heading, you can change the parameter value at any position along the heading. You can create as many parameter changes along a heading as you need to reflect the features along the heading accurately.

Changes to the parameters along a heading are displayed in the Parameter changes data grid. You use this data grid to choose the values for the profile, density, model, and numeric user parameters that are applied to the heading at the change position. The changed parameter values remain in effect until the next change position, or the end of the heading.

You can also edit the parameter change values using the spreadsheet view, by clicking the Edit in spreadsheet view icon. Editing parameter change values in the spreadsheet view allows you to use spreadsheet functionality to fill information into the data grid more rapidly.

Note: You cannot change all parameter values of a heading. Development collections and text-type user parameter values cannot change along a heading. Parameters that cannot be changed along a heading are not displayed in the Parameter changes data grid.

Columns in the Parameter Changes Data Grid

Column	Description
Heading	The heading name.
Length	The distance from the start of the heading at which the new parameters will take effect.
Profile	The shape of the heading in cross section. The profiles available for each heading are described in the Profiles data grid. The profile is used in volume calculations for the heading.
Density	The default density to use for the heading. If there is no geological model found for the heading, this density value is used to calculate mass.
Model	The geological model used to calculate volume, mass, and qualities of headings. You can select any model that you defined in the Define Geology > Models tab. Note: You do not have to define a model for the heading. If there is no model defined, the length, volume, and mass of the heading are still calculated and reported with the material class named UNDEFINED.
User parameters	The values for the numeric user parameters defined for the scenario. Each numeric parameter you defined in the User parameters data grid in the Define geology > Models tab, or the User Parameters form appears as a separate column at the right of the Initial parameters data grid.
Comments	Any notes you want to make about the parameter change.

See also

• Parameters
• Profiles Data Grid
• Initial Parameters Data Grid
• Spreadsheet Views
• Create a Parameter Change
• Change Multiple Rows in a Data Grid