Calculating the volume of coarse aggregate stockpile to the volume of Portland Cement (PC) concrete used per length of highway pavement Portland Cement concrete (PC concrete) is used for myriad construction purposes. For example, flatter stockpiles will benefit more from a high GSD than taller stockpiles. 1/3 x 3.14159 x Radius 2 x height Volume cubic feet C. Our Client found that drone mapping is an efficient way to calculate the volume of stockpiles and pits. 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. Take your time, and be as accurate as possible, as this will lead to accurate volume. Why use photogrammetry for stockpile volume measurements? High-resolution images give you more details of the mapped stockpiles NOTE - Placing the points when defining the stockpile is important. 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. In the cell A2 we will enter different radii and after each input in the cell B2 we get the result of calculating the volume of spheres corresponding to its radii. b) Analysis/Measurement > Volume, x Use Heights from Terrain. In the cell B2 we write down the formula for calculating the volume of a sphere in one line: (4/3)PI ()A23 (A2 is the cell reference). Speed and accuracy: that's the reason why most of the largest mining companies use drones and photogrammetry software in their workflow. In order to determine the stockpile volume, I define an area feature (polygon) with 6 vertices.
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