TxDOT – Houston District

TxDOT – Houston District 2017-12-20T09:28:18+00:00

Project Description

Aerial LiDAR Mapping of IH 10

Brazos and Colorado Counties, Texas

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 m², 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.