What is the Difference Between Plane Surveying and Geodetic Surveying?

The main difference between plane surveying and geodetic surveying lies in the way they measure the shape and size of the Earth. Here are the key differences between the two types of surveying:

Plane Surveying:

• Assumes the Earth's surface as a flat plane, ignoring its curvature.
• Suitable for small-scale or local surveys, such as designing roads or defining property boundaries.
• Survey accuracy is low, and errors and distortions are introduced as the area increases.
• Uses normal instruments like chains, measuring tapes, and theodolites.
• Economic and easy survey method.

Geodetic Surveying:

• Considers the Earth's surface as a curved surface, taking into account its curvature.
• Suitable for large-area surveys, such as defining precise positions on the Earth's surface.
• Survey accuracy is high, and it requires complex calculations, corrections, and adjustments to eliminate errors and uncertainties.
• Uses more precise instruments and modern technology like GPS.
• Requires sophisticated and skilled personnel, making it more expensive than plane surveying.

In general, geodetic surveying is preferred for areas larger than 250 km², while plane surveying is adequate for areas smaller than 250 km². The choice between the two methods depends on factors such as the purpose, scope, budget, and standards of the survey.

Comparative Table: Plane Surveying vs Geodetic Surveying

The main difference between plane surveying and geodetic surveying lies in the way they treat the Earth's surface. Here is a table summarizing their differences:

Plane surveying is more practical for small-scale or local surveys, such as designing roads or legal/cadastral purposes like defining property boundaries and ownership. Geodetic surveying, on the other hand, is preferred for large-scale mapping and navigation. The choice between geodetic surveying and plane surveying depends on factors such as the purpose, scope, budget, and standards of the survey.