This part of the function contains the basic calculation settings for the Slope Calculation. The palate 'Slope Surface' with Calculation Settings is shown below.
Distance from Object
This parameter enables you to start a slope calculation at a fixed distance from the selected object. This is often used when calculating slopes for building projects. The parameter is graphically represented in the figure shown below.
This allows the user to select different methods to describe height information for the selected object. The function gives the user an opportunity to combine the horizontal geometry from the object with elevation from other sources.
There are three different methods to choose from which are shown below:
Object elevation - both surface level and depth will be disabled.
Subsurface level - then Surface Level will be enabled.
Subsurface level + depth - both surface level and depth will be active.
This choice uses the geometry from the selected object in the drawing. Same height.
Surface Elevation (works only on Subsurface Level)
This choice uses the horizontal geometry from the planned object but gets the elevation for the object from a selected subsurface level defined in the terrain model.
Subsurface level + Depth
This choice uses the horizontal geometry from the planned object but gets the elevation for the object from a selected subsurface defined in the terrain model and a defined depth from this level. See the examples shown below.
These values depend on the chosen method in Calculate from. You cannot edit these values in this version of slope calculation, but it will be implemented in a future version. Now it will always calculate towards the terrain surface.
Main Slope Settings
This is where you set up the slope settings to be used in the calculation.
Cut soil users can type in the value they want to use for all soil cut slopes. The value is given in meter/meter, so the standard value of 0.5 means 1.0m/2.0m. This value is used for all soil materials, as well as the material's Soft spot, Topsoil, and Vegetation.
Cut Rock users can type in the value they want to use for all rock cut slopes. The value is given in meter/meter, so the standard value of 10 means 10 .0m/1.0m. This value is used for all 5-rock materials.
Fill users can type in the value they want to use for all fill slopes. The value is given in meter/meter, so the standard value of 0.5 means 1.0m/2.0m.
Main Calculation settings
This is where you set up the main calculation settings to be used in the calculation.
The standard value comes from the calculated settings palate in the terrain model. Users can type in the value they want to use. This value will affect the number of profiles calculated.
Profile in Corners
This value indicates extra profiles that are calculated in the outer corners. The value means an extra profile in the corner for each n grade. The standard value is 12, which means that there will be calculated approximately 8 extra profiles in each corner.
This value controls the distance from the baseline the calculation will search for crossing terrain lines. The standard value is 200.0m and that means that the calculation will search 200.0m from the baseline for terrain information. Users can type in the value they want to use. Try out different search widths to control the calculation.
The volume and area of the slope calculation can be shown in a separate dialog box during calculation. The standard value is active and a dialog box 'Volume and Area Calculation' will pop up as soon as a slope is calculated.
This dialog will show the cut volume for each cut material and the fill volume as well as the surface area for the slopes and the center area. Automatically the volume and area calculation results in this dialog box will be updated when the parameters or the baseline are changed.
The button OK-Draw will draw the result of the volume and area as a table in the drawing. The command prompts for:
Choose the upper-left corner of the table Point in the drawing.
Select an insertion point for the upper left corner of the table.
E.g., The table is shown below.