While surveying with drones, images of the ground are extracted from multiple vantage points. Through processing these images, a photogrammetry software may then create orthomosaics and 3D models, that it could measure accurate distance, as well as surfaces and volumes of physical objects.
Data outputs from the drone
Images taken by the drone are often saved on a memory (such as Sdcard), just like for just about any other camera. According to the technology utilized by the drone, the images are already geo-tagged or could be imported in a geo-tagging software, such as WingtraHub. Based on the size of the survey site, you almost certainly have between a few hundred images and some thousand, and each image contains geographical information (X, Y, Z).
Importing right into a photogrammetry software
After importing or uploading the geo-tagged images in a photogrammetry software such as Propeller, Bentley ContextCapture or Pix4D, images will be stitched together to create 2D or 3D types of the surveyed site. Image processing can be a lengthy process depending on the number of images and the performance of your computer. Find more info are desktop-based, thus requiring robust hardware. Other software is cloud-based, employing powerful servers instead of your neighborhood computer to process the info.