Sight distance
Sight Line Elevation Checker
Find the elevation of a straight sight line at a distance measured from the eye point.
Sight line inputs
Use elevations on the same vertical datum. Include the eye and target heights above their ground elevations.
Elevation at the check point
Scroll the chart horizontally to see the full line.
Linear interpolation
Z(x) = Zeye + (Ztarget − Zeye) × x / L
x is the distance from the eye; L is the total distance. Use the same distance basis for both.
This tool interpolates between the two endpoint elevations. Use the ground profile tool to compare the line with measured ground points.