Tools
Resources
Topographic Survey Calculations
Practice essential calculations used in topographic surveying with our interactive tools and step-by-step solutions.
Scientific Calculator
Common Formulas
Elevation Difference
ΔH = BS - FS
Where: ΔH = Change in elevation, BS = Backsight, FS = Foresight
Slope Calculation
Slope (%) = (Rise / Run) × 100
Where: Rise = Vertical distance, Run = Horizontal distance
Practice Problems
Problem 1: Elevation Difference
Calculate the elevation difference between two points given:
- Backsight reading: 1.456m
- Foresight reading: 2.134m
Format: Enter answer to 3 decimal places
Problem 2: Slope Analysis
Calculate the slope percentage between two points:
- Horizontal distance: 50m
- Vertical rise: 3m
Format: Enter percentage (e.g. 6.0)
Problem 3: Contour Interpolation
Find the elevation of point P between two known elevations:
- Point A elevation: 145.6m
- Point B elevation: 147.2m
- Total distance A to B: 20m
- Distance A to P: 8m
Format: Enter elevation to 1 decimal place