Georgia Land Surveying is pleased to announce airborne LiDAR mapping as a new service we offer. Traditionally LiDAR mapping has been reserved for large mapping projects using fixed wing aircraft. The technology allows for the capture of an extremely dense amount of points; however, the high operational cost of airplanes or helicopters have made the technology cost prohibitive for sites under 50 acres. With the miniaturization of the LiDAR sensor and IMU (Internal Measurement Unit) we are able to mount the system to a UAV, thus reducing our cost and speeding up our delivery time. Georgia Land Surveying is one of the first firms in the state to acquire this technology.
We are able to save our clients’ money and deliver a survey quicker using this technology. Traditionally a site that might take three weeks can be done in 5 days. Shown below is a LiDAR scan of a shopping center. Keep in mind that every pixel in this cloud has an X, Y and Z coordinate on its location making it possible to measure anything shown in the cloud.
When it comes to accuracy you might wonder just how good the data is. Below is a plot of a scanned area. The site was flown and a density of 90 points per meter was generated from the LiDAR scan. From that, we decimated the cloud down to 3 points per meter, and then we took ground shots using a Leica TS16 total station. What we found was that on hard surfaces we were with 0.06′ feet and in grassy areas we were within 0.09′. With this type of accuracy, we can meet the national mapping standard for 1-foot contours.