Geodetic Distance Calculator (Vincenty's Formulae)
This calculator is designed for scientists and engineers needing precise geodetic distance calculations. It uses Vincenty's formulae, which are highly accurate for ellipsoidal models of the Earth.
Calculate Distance
Distance Results
Data Source and Methodology
All calculations are based on Vincenty's formulae. For details, see NOAA's Geodetic Calculation documentation. All calculations are based on the formulas and data provided by this source.
The Formula Explained
The equations used are complex and involve iterative solutions to accurately model the Earth's shape. They are beyond simple algebra and involve geodesic computations on the ellipsoid.
Glossary of Variables
- Latitude: The coordinate specifying the north-south position of a point.
- Longitude: The coordinate specifying the east-west position of a point.
- Distance: The shortest path between two points on the Earth's surface.
How It Works: A Step-by-Step Example
Assume Point 1 is at 34.05° N, 118.25° W, and Point 2 is at 40.71° N, 74.01° W. The calculator will compute the geodetic distance using Vincenty's iterative algorithms to account for Earth's ellipsoidal shape.
Frequently Asked Questions (FAQ)
What is Vincenty's Formulae?
Vincenty's formulae are used to calculate the distance between two points on the surface of a spheroid.
How accurate is this calculator?
The calculator provides highly accurate distances by using ellipsoidal models of the Earth.
Can this calculator be used for air navigation?
Yes, due to its precision, it is suitable for air and marine navigation.
How do I convert geographic coordinates to decimal?
Use the formula: Degrees + (Minutes/60) + (Seconds/3600).
Why are ellipsoids used instead of spheres?
Ellipsoids provide a more accurate representation of Earth, accounting for polar flattening.