C+S July 2021 Vol. 7 Issue 7 (web)

Point cloud derived from a GS18 I image group that has been processed at full solution.

Point cloud captured with an MS60 MultiStation.

With the images, you can immediately go through and validate what you captured or see what you missed. “You can see it in 3D and pull discrete measurement points right from the images,”Kilburn explains. “You can also pull additional points from the imagery later without having to return to the site. For example, if you come back with the data and then find out the engineer really wanted something else, you can extract that from the imagery to survey grade without having to go back to the site. That becomes a huge efficiency gain.” As always, understanding the project requirements and deliverable is key to choosing the right technology—or, in some cases, the combination of technologies—that will provide the best solution. “GNSS with visual positioning doesn’t replace LiDAR but is an enhancement and a different method we can use to increase surveying safety and ef- ficiency,”Kerr says. “There are places a scanner can’t see from the ground. There are places on the ground a drone can’t

capture from the air. There are situations where flight restrictions or the need for oblique imagery or tight con- trol eliminate the use of drones. Advances in hardware and software now come together seamlessly to enable surveyors to tackle almost any project, regardless of the type and level of quality needed. That’s the real value.” To learn more about solutions that can maximize your surveying potential, get in touch with a surveying and engineering expert at Leica Geosystems.

Colorized point clouds from both the GS18 I GNSS receiver and MS60 MultiStation overlaid.


july 2021


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