Photogrammetry appeared in the middle of the 19th century, almost simultaneously with the appearance of photography itself. The use of photographs to create topographic maps was first proposed by the French surveyor Dominique F. Aragon in about 1840. So, in this article, we’re going to talk everything about photogrammetric mapping such as the definition, goal, and benefit of it. Types of photogrammetry: photogrammetry is of two types. They are aerial photogrammetry and terrestrial photogrammetry. Read this article until the end!
What is photogrammetric mapping?
Photogrammetry is a technique for obtaining precise and dependable data for mapping purposes. It combines multiple aerial photography images to create a map of a specific area of interest (AOI). This is known as stereophotogrammetry or mosaic photogrammetry. Topographic mapping with photogrammetry is the capture of two digital aerial photographs of a location from different angles. These aerial images are then analyzed in order to generate maps for various projects.
The Goal of photogrammetric mapping
Photogrammetry is a technique for surveying and mapping that employs photography. We can use photogrammetry to calculate the distance between any two objects. Using photogrammetry software, we can create 3D renderings from captured images. It was originally used for topographic mapping, but it is now used in a variety of other applications. It is the first remote sensing technology that uses photographic images to determine geometric properties about objects. Triangulation is the fundamental principle of photogrammetry. Taking photographs from at least two different locations where the line of sight from each camera to points on objects can be developed.
The Benefit of photogrammetric mapping
Below are some benefits of using Photogrammetry for mapping; Since the need for topographic mapping has grown, photogrammetry methods have evolved into excellent mapping solutions. There are numerous advantages that have been identified, making aerial photography a very popular method. Among the numerous benefit of using photogrammetry for mapping are the following:
Aerial images obtained from a high altitude using photogrammetric tools are dependable and precise. As a result, it can be used in forestry, utility, agriculture, and mining.
- Rapid Results
Photogrammetry can collect data from large areas quickly and efficiently. It is a low-cost method because it does not necessitate long hours of extensive ground surveying.
- Minimum Risks
Aerial photogrammetry mapping also eliminates the risk of expensive equipment being lost in difficult landscapes such as natural disaster sites.