Earthworks Volumes

Mining and resource companies require measurement of the volumes of their product stockpiles for quality control and stock audit purposes. In some instances, such as when measuring large and/or numerous pits or stockpiles, ground survey methods are not feasible. In other circumstances, such as at steep or unstable faces, or with continuous feed cone stockpiles, safety risks prevent ground survey.

Qasco offers both ground and photogrammetric techniques for volumes work. For large projects, photogrammetric volumetric calculations produce time and cost savings to the client, with no safety concerns.

Qasco uses a combination of commercially available and proprietary software to calculate volumes of stockpiles. In situations where the base is obscured, we often make base observations from earlier imagery.

Clients are provided a Volumes Report containing information including time and date of photography, volumes matched with type of material, and comments (such as shadows obscuring vision, or obstructions by plant or machinery) regarding the accuracy of calculations.

In addition to volume pit and stockpile calculations and reports, we also provide orthophotos of sites through our digital imaging department.

Topographic Mapping

Modern topographic maps are produced by using the DTM data to generate contours, which are then cartographically enhanced with nomenclature, grid and title block data. Similarly, an image map is produced by replacing the detail layer of the photogrammetry with the ortho image.

An example of a topographic map for a quarry site is available in the orthophoto section of our website.

Other products that the photogrammetry department specialise in include: