How Omni expresses elevation grade
The fetched Omni elevation grade page presents the same terrain steepness in several equivalent forms: rise-over-run slope, percentage grade, angle of elevation, and rise-to-run ratio.
Elevation grade equations
slope = rise / run
grade angle = arctan(rise / run)
grade percentage = (rise / run) x 100
Why this matters in construction
Omni specifically ties elevation grade to road design, retaining walls, drainage, and site assessment. That same slope information also feeds into the vertical curve workflow when engineers transition between grades.