Factor of Safety Heatmap
Visualize the distribution of factors of safety across trial surfaces.
Visualize the distribution of factors of safety across trial surfaces.
The factor-of-safety heatmap colors the model domain by the lowest factor of safety passing through each location, giving a quick picture of where weak zones cluster and how broad the critical region is.
Enabling the heatmap
Turn on Show FOS Heatmap in the Compute panel display controls. It is off by default. The heatmap is built from the computed trial surfaces, so a search must have been run first.
Controls
| Parameter | Unit | Default | Min | Description |
|---|---|---|---|---|
| Show FOS Heatmap | — | Off | — | Toggle the heatmap overlay. |
| Heatmap Cell Size | — | 1 | 0.1 | Size of each heatmap cell. Smaller values give a finer, slower map. |
| Color Scale FOS Min | — | 0.8 | — | FS mapped to the warm end of the scale. |
| Color Scale FOS Max | — | 2.0 | — | FS mapped to the cool end of the scale. |
The color-scale minimum and maximum are shared with the surface-styling color scale used when showing all surfaces.
Reading the heatmap
Each cell is colored by the minimum factor of safety of the surfaces passing through it, mapped onto the color scale:
- Warm (red) cells are at or below the color-scale minimum — the most critical zones.
- Cool (blue) cells are at or above the color-scale maximum — the most stable zones.
Cells between the limits are interpolated across the scale. A surface with a factor of safety below the minimum or above the maximum is clamped to the corresponding end.
Tightening the scale
To resolve detail near the critical value, narrow the color-scale range (for example 0.9 to 1.3). Cells then span the full color range over a smaller FS band, making small differences easier to see.