How do Elevation Filters (First, Last, Lowest and Highest Pass) impact my Volumes?
Elevation Filters impact Volumes by selecting a hard coded pass that meets certain time or elevation requirements that supersedes other logic.
By default WorksOS without any Elevation Filters applied calculates the Last Pass prior the ‘From’ surface to the Last Pass within the ‘To’ surface.
- Applying a First Pass Elevation Filter will look at the First Pass by time within the ‘From’ and/or ‘To’ surfaces and will not go back to the Last Pass prior to these. It is literally the first time machine(s) pass over the ground within the Filtered period - this will alter the state of the ground from previous Last Pass.
- Applying a Last Pass Filter will look at the Last Pass by time within the ‘From’ and/or ‘To’ surfaces.
- Applying a Lowest Pass will look at the Lowest Pass by elevation within the ‘From’ and/or ‘To’ surfaces.
- Applying a Highest Pass will look at the Highest Pass by elevation within the ‘From’ and/or ‘To’ surfaces.
Applying any Elevation Filter when only using a single Filter in a Volume calculation will result in a 0 volume calculated as you are comparing the ‘From’ and ‘To’ surfaces to the same hard coded pass which is the same filtered surface. Elevation Filters should only be used when two separate Saved (Favorite) Filters are applied in Work Completed calculations.
Note: Applying an Elevation Filter will exclude any Surveyed Surface data in WorksOS and only use Machine Data.