See how our Survey Team at Stahly Engineering is using innovative technology to bring a new perspective to our clients’ projects.
Stahly Engineering uses modern survey technology to produce point cloud datasets for modeling, planning, and design purposes. Point clouds are a means of collating a large number of single spatial measurements into a dataset that can then represent a whole. The colorization of single points within a point cloud then present a 3D model.
- Stahly uses terrestrial scanning, which utilizes LIDAR (light detection and ranging) technology and techniques to collect tens of thousands of individual points per second.
- Stahly also utilizes Unmanned Aerial Vehicle (UAV) technology and photogrammetry survey techniques. Photogrammetry uses individual, overlapping, high resolution photographs to generate detailed 3D point clouds. This technology allows for large scale data collection in a short period of time.
VA BLACK HILLS HEALTH CARE SYSTEM CAMPUS: This survey included a UAV flight to capture photogrammetric data of the entire survey area including roads, sidewalks, site features, and the buildings of interest. The result of this survey was a high-density point cloud model on a published horizontal and vertical datum as pictured below.
In addition, terrestrial laser scanners were utilized to scan the buildings of interest with even higher detail and precision than was provided via the UAV. These scans were all registered with one another to create a conglomerate dataset that matched the spatial reference of the UAV survey. The data captured by the terrestrial scanners which was not captured via the UAV provided the necessary “fill-in” data with higher precision than the overall UAV survey. By filtering out less precise points from the UAV data of the buildings, one final dataset was created which modeled both the buildings and the site with high precision- all on a published horizontal and vertical datum.