G&AI performed professional survey and aerial mapping along IH 10, from the Colorado River to the Brazos River, in Colorado and Austin Counties. Helicopter LiDAR data was captured along the 31-mile transportation corridor at approximately 1000 AGL. The LiDAR product consisted of ? 25 points per mē, which was suitable for generating 1 contours. The LiDAR met an accuracy of 0.15 on hard surfaces and 0.3 on soft surfaces. G&AI processed, classified, and performed DTM feature extraction from the LiDAR point cloud. In addition to LiDAR, G&AI also captured 5cm GSD (ground sampling distance) digital imagery to produce orthoimagery and to collect 2D planimetrics for the project.
This project was delivered on time and exceeded accuracy specifications.