![]() It is used to create accurate and detailed maps, models of buildings and landscapes, and to measure distances and volumes. Photogrammetry has many applications in various fields, such as surveying, architecture, engineering, and mapping. The process involves identifying common points on the photographs and using these points to triangulate the location of the object in three-dimensional space. ![]() It involves taking multiple photographs of an object or area from different angles and then using software to analyze the images and create a 3D model. × What is Photogrammetry? Photogrammetry is a technique that involves the use of photographs to measure and extract three-dimensional information about an object or scene. Overall, optical zoom is a valuable feature that can help you capture high-quality, detailed images from a distance, making it a must-have for many photographers. This can be especially helpful for wildlife photography or for taking photos of events from a distance. Secondly, optical zoom allows you to get closer to your subject without physically moving closer, which can be useful in situations where you cannot or do not want to approach your subject closely. In contrast, digital zoom often results in a pixelated, blurry image because it enlarges the existing pixels of an image, which degrades the quality. Firstly, optical zoom maintains the image quality and sharpness because it captures more detail from the subject. ![]() Optical zoom is better than digital zoom for several reasons. Unlike digital zoom, which simply enlarges the pixels of an image, optical zoom physically moves the lens elements to zoom in or out, resulting in a higher-quality, more detailed image. For example, flatter stockpiles will benefit more from a high GSD than taller stockpiles.Optical zoom is a feature found in cameras that allows you to change the focal length of the lens, which in turn magnifies the image. Vertically, they lower the uncertainty in Z values, which is proportional to the resolution. Horizontally, high-resolution photogrammetric results create more precise stockpile models, and thus better volume measurement accuracy than ones interpolated from certain measured points. A photogrammetric survey with a fine ground sampling distance (GSD, which indicates the actual distance each pixel represents) is able to better describe irregular stockpiles in detail. When it comes to stockpile volume measurements, stockpiles do not conform to a perfect shape. Why use photogrammetry for stockpile volume measurements? High-resolution images give you more details of the mapped stockpiles These top mining companies claim that by applying the photogrammetry workflow with Pix4Dmapper, they can achieve measurement accuracies of around 2-5% for their stockpile volumes. Of the biggest 40 mining companies announced in PWC’s mining report, nearly half of them use Pix4Dmapper photogrammetry software for stockpile measurement and volume comparison as part of their mining workflow.Ĭalculating and managing stockpile inventory, that is, finding a solution for accurate volume measurement and easy inventory management, is one of the biggest challenges in the mining industry. ![]() Speed and accuracy: that's the reason why most of the largest mining companies use drones and photogrammetry software in their workflow.
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