Photogrammetry Surveying

Photogrammetry surveying is a reliable alternative to many ground surveying activities when large area mapping is needed as it removes some of the most time-consuming tasks.

In photogrammetry we make reliable measurements using digital photographs of features on the Earth’s surface. The biggest advantage of photogrammetric surveys is the ease and speed with which we can capture images, analyse the data to get measurements and convert them to a 3D map in no time.

3D image explaining how photogrammetry works

BENEFITS OF PHOTOGRAMMETRY SURVEYING

  • No need for expensive field work and ground surveying activities.

  • Get an accurate & permanent measured photographic record of the area.

  • Survey locations that are difficult, unsafe or impossible to access.

  • Quickly re-evaluate missing information using the existing records.

  • Measurements can be taken without disrupting traffic or work on site.

  • Using topographic & cultural features, get a wide or broad view of the area.

HOW DOES IT WORK?

WHY DIGITAL INC?

  • Rapid response & programme
  • Cutting-edge survey technology

  • Revolutionary value

  • Exceptional customer service

Enquire now

WHY DIGITAL INC?

  • Rapid response & programme

  • Cutting-edge survey technology

  • Revolutionary value

  • Exceptional customer service

Enquire now

FAQs

The main principle of metric photogrammetry is that we make precise measurements on mainly aerial photographs to determine relative locations of points.

The way photogrammetry surveying works is that we capture a large range of overlapping photos of an area, showing the same point from various different angles. This allows us to create a high-resolution 3D map that includes information on elevation and height as well as shape, texture and colour. Read more about drone surveys.

The primary equipment used to create an accurate photogrammetric model is a high resolution camera and specialist computer software. A drone with a trained pilot is also commonly used to fly the camera over the area.

Accuracy is interpreted in two ways: relative and absolute. To ensure absolute accuracy is fit for commercial purposes, the photogrammetric data must be tied to ground control points using GPS and total stations by professional surveyors. Accuracy levels of up to +/- 20mm can be achieved.

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