Challenge:
An engineering client required that existing conditions be captured for a 3.5-mile transmission corridor to design crossing locations for future utility improvements. Due to safety concerns, additional data was to be captured from the ground level. Valdes was engaged to perform 3D scanning combined with conventional survey methods to provide existing conditions for engineering design.
Solution:
The Valdes survey team captured the requested data by combining 3D scan data to capture overhead lines with conventional (total station) survey data pertaining to access roads, buried utilities, and existing utility pole/wire locations. This task was completed by carrying out the following steps:
- Prepared a project plan to ensure the correct areas of focus were scanned/surveyed and accurately combined with survey control. This included specific GNSS equipment due to the remote location of the project.
- Traveled to the site and recorded the necessary field data to satisfy the project requirements.
- Post-processed and registered 3D scan data relative to survey information to create a combined deliverable.
- Documented a reference system for all data including map legends, temperatures/wind speeds at the time of measurement, 3D point clouds, and a master AutoCAD file.
Impact:
Valdes’ efforts resulted in a safe, efficient approach to capturing accurate survey data on unsafe and inaccessible infrastructure. Additionally, the project data was positioned on state plane coordinates, allowing correlation with additional references/resources and future use of project coordinates.