6 Benefits of Using Photogrammetry for Mapping and Surveying

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If you are still using standard mapping and surveying methods, it is time to make the switch to photogrammetry. Here are 6 benefits of photogrammetry to convince you.

Photogrammetry refers to the process of taking measurements from photos, by analysing the surface points of an object. Once the measurements of a series of overlapping images are taken, a computer software is used to stitch the images together, not just as a 2D image, but also as a 3D model. These models/images are used to measure areas, lengths and volumes of structures and other points of interest. The term photogrammetry is the combination of the words “photo” and “meter”. It simply means the measurements taken from photographs.

Today, photogrammetry has become a much sought-after surveying and mapping technique that is used for site planning, topographic mapping, earthwork volume estimation and image-based mapping to name a few. Reliable information about physical objects and the complete environment is taken into account. Terrestrial and aerial photographs are taken and then recorded, measured and evaluated.

The process of photogrammetry involves accurate project planning, image retrieval, image processing, image adjustment, data accumulation and finally the presentation of the end result. The photographs taken for photogrammetry are captured from a metric camera, sometimes a typical camera or from digital sensors. The images are usually captured from a tool that is fixed on a satellite, aircrafts, helicopters or tripods which is set up and then mounted on the ground.

If you are using standard mapping and surveying methods, it is time to give photogrammetry a shot. Here are some benefits of photogrammetry that can convince you.

  1. Accurate and measured records
    Through an aerial photograph, photogrammetry can produce an actual and permanent photographic record of a particular location while capturing the image. Since the image will have metric properties, it will not only be a pictorial record, but also an accurate and measured record that can be successfully relied on for any project.
  2. No requirement for fieldwork
    If you require information to be re-surveyed or re-evaluated, you do not require expensive fieldwork. The photogrammetry images taken can be used for measuring again and again, thereby giving you new information in a convenient manner. Photogrammetry is a great way to find missing information like inadequate offsets for cross-sections.
  3. Corresponds better with data sources
    Photogrammetry offers a broad view of the project field, by the classification of both cultural and topographic features. The wide mapped area provided by line studies can help you correspond it more with data sources, as compared to other traditional methods.
  4. Ideal for difficult-to-access locations
    Photogrammetry is great to use in locations that are difficult, unsafe or even impossible to access. It is an ideal surveying method that can be efficiently used in areas where fieldwork may be dangerous for the safety of the surveying crew.
  5. No disturbance to traffic
    With the use of photogrammetry, road surveys can work without causing any disturbance to traffic by closing off lanes or endangering the field team. Since photogrammetry will take into account elevation data along with road features, it can be viewed in the office, without you having to review it on the actual field.
  6. Easy-to-describe information
    Through photogrammetry, the coordinates of each point in the mapping field can be evaluated without any additional efforts or cost. Once the aerial images are taken, they can be used to convey or describe information to the state, public, transportation divisions and even federal agencies.

To make a photogrammetric survey project successful, you have to have a clear understanding of its components and its benefits. With careful planning and execution, photogrammetry can be a successful venture. If photogrammetry is not one of your core skills, why not consider outsourcing? At Outsource2india, we offer expert photogrammetry services that takes mapping and surveying to the next level. Our team of skilled engineers have expertise in planimetric services, ariel photogrammetry, stereo editing and terrain mapping to name a few. Our expertise combined with our skills and information security can ensure a successful photogrammetry project. Find out more about outsourcing photogrammetry services today.

Did you like reading this post? Would you consider trying photogrammetry? Do you think it will more convenient and error-free when compared to traditional methods of mapping? Let us know what you think by leaving a comment in the box below. We, at Outsource2india love to hear from you!

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