Aerial photogrammetric surveying is a form of surveying that makes use of aerial photography and photogrammetric technology to map a given area of land. It is often used in the fields of engineering, topography, forestry, and cartography.
Aerial photogrammetric surveying works by taking multiple photographs of the area from various angles and then using computers to measure various features in the images. With aerial photogrammetric surveys, all terrain is visible, which provides a greater level of accuracy than traditional forms of surveying. It also eliminates the need for surveyors to go out into the field and measure individual sections of land, saving time and money.
The first steps of an aerial photogrammetric survey involve taking photographs of the land from various angles. These photos are then used to create a precise and detailed map of the area. The photos are first divided into “tiles” or segments, and then each tile is stitched together to form a topographic map. All of the data collected in the survey is then combined and converted into a digital map.
Once the photogrammetry is done, a professional surveyor then uses the digital map to determine the location of features such as roads, buildings, rivers, and lakes. The surveyor also uses the map to identify elevations and contours, and to measure distances between points. In addition to providing a precise map of a certain area, photogrammetric surveys can also be used to monitor any changes over time.
Aerial photogrammetric surveying is used for many different applications. The technology can be used for mapping construction sites, water systems, agricultural land, forests, and nature reserves. It can also be used in the engineering of roads, bridges, and airports. Additionally, aerial photogrammetry can be used to produce three-dimensional models of terrain, making it useful for archaeological and environmental studies.
Aerial photogrammetric surveying is also used for more mundane applications such as measuring land for taxes and real estate purchases. It is also used for remote sensing applications such as distinguishing between plant life and no-growth zones.
The accuracy of aerial photogrammetric surveying is dependent upon the quality of the equipment used and the terrain being mapped. It is not suitable for very dense vegetation or steep slopes, as the imagery can be distorted. However, with the right equipment and experienced professionals overseeing the survey, aerial photogrammetric surveys can provide highly accurate results.
Aerial photogrammetric surveying is becoming increasingly popular as an alternative to traditional surveying methods. With its ability to map a wide area in less time and at a lower cost, it is well suited for many applications. It is a fast, reliable, and cost-efficient method of mapping that produces results that are a world smarter than traditional surveying methods.
