Drone Surveying

Using cutting-edge software, captured nadir images from autonomous grid flight-paths are layered onto Google Earth to create georeferenced orthomosaic maps which are much more up-to-date and high-resolution that Google Earth projections. These maps allow for excellent visualisation of larger sites and can be file exported to clients for analysis. Hundreds of acres can be mapped in a day’s worth of flying!

Orthomosaic maps allow for volume measurements of stockpiles to be quickly measured. Collaboration with GPS survey equipment (collecting of a small number of Ground Control Points and post-processing the data in the software) improves global accuracy to the point where incredible time savings can be made with no sacrifice in accuracy. A DEM (Digital Elevation Model) allows for stockpile boundaries to be defined from which calculations can be made.

 

(See the below 3D model representation of the  2D map and DEM.)

Site Section
by ngates534
on Sketchfab

Volumetrics are a truly ground-breaking function allowing for vast savings in time and costs compared to traditional ground-based surveys. Turnaround periods are much faster and the need for climbing and walking piles to collect points with its associated danger elements are removed. Health and safety concerns in terms of this are removed and associated insurance costs cut. Construction and mining clients can operate more efficiently by cutting costs and by spending more time utilising data and less time collecting it. We collaborate closely with survey professionals and drone industry experts (http://www.cloudd8ta.com/) with many years experience in the field and endeavour to answer any questions you may have about this ever-emerging surveying method. Cloudd8ta process our collected imagery to create the 2D maps and 3D models and input the GCP data into the locations collected in numerous overlapped images that we collect with our survey professionals.

An example of the final output which we trialed on a mining site can be seen below in the form of a 3D model annotated with the cubic meter volumes calculations for each stockpile.

Initially with the help of Cloudd8ta we ran a case study on accuracy of volumetrics using a UAV compared to other surveying techniques. We approached a local site and asked to run the test over two muck piles present there. We had the site engineer survey the piles using his total station. We then used our UAV method, overlaying our map with the engineer’s survey in AutoCAD to draw the same boundaries around the piles. See the results in the PDFs with annotations below. <1% discrepancy over both piles! Cloudd8ta have verified the accuracy of their work compared to other methods as this has been their line of work of years in the making. The test we ran left us with no doubts in our mind as to the accuracy of our techniques, which our clients will need! We are currently offering this function as a solution to our clients.

2016-12-23-volumes-calc-model

academy-annotations-report

With 3D models, accurate representations of sites can be created for site exploration/inspection of larger sites. Exported files can be distributed to clients for integration with industry software such as AutoCAD and BIM. This allows for excellent communication within teams and enhanced efficiency e.g. accurate models of a site build can be compared with site design which can allow for early detection of problems and inaccuracies.

By capturing manual oblique images as well as nadir we can create 3D models of structures which the real estate industry can benefit from. Check the 3D example on our about page!

Get in touch to tell us about your project!