Airborne Lidar Technology In Transportation Corridor
Key words: Airborne lidar, Transportation Corridor, Route Planning , Construction, Optimization route, Change detection, As built survey
Airborne lidar technology is widely accepted among transportation companies as an efficient tool for acquiring geo-referenced spatial data for various applications essential to transportation route design, expanding of current design.
New route design can take the fundamental advantages of the lidar workflow which is all-digital format of its data collection, processing, analysis, delivery, and storage steps. By integrating high accuracy point cloud data and imageries with transportation GIS software workflow, it optimizes the route selection, cross section, data transfer, it realizes a seamless work flow from survey , designing, construction to transfer the asset to operation management. This maximizes the efficiency of the entire workflow, effectively avoiding duplication, saving investment. Furthermore, digital data acquired during an initial lidar survey can be archived and used to form the foundation of a permanently searchable and editable database, allowing subsequent time-based studies such as change detection.
New Route Planning
Airborne LiDAR technology can provide users with a resolution better than 0.1 meters orthophotos, digital elevation model , cross section and contour. Surface features can be visualized, vertical and horizontal spatial information can be obtained in office computer from the chart, the designer in the office has all the feature which can viewed across computer for project design, including crops along the corridor, private land boundary, houses etc.
Route Optimization and Construction design
LiDAR system can collect high density point cloud data to generate digital terrain model (DTM) at multi scale to meet the various needs of different precision topographic map. According to the different scale topographic map, the route can be directly positioned around the corridor structure and visualized, and make engineering analysis and design. It can provide highly accurate data in the preliminary design stage, meet the accuracy requirements of construction (such as: accurately calculate the amount of fill and cut, tunnel site selection and entrance , bridge piers elevation, slope design, curvature design etc.), It greatly reduce road design change and save time and cost.
As Built vs Design
Lidar Data Line of Sight Analysis
Road Clearance Detection
All Digital Information Exchange
Airborne lidar technology is a powerful tool to maximize the efficiency of transportation design and asset management. It represents a clear advance over traditional surveying methods for this applications because it provides several key advantages like unprecedented data collection efficiency, an all-digital workflow and excellent data quality and accuracy. It creates a digital platform among designing institutes, constructions contractor and operation companies. It realized a seamless handover of the digital data on demand among the three parties. Therefore, airborne lidar data is highly suitable for reliable engineering design and analysis of the physical parameters of transportation corridor, and for the management of transporation construction and maintenance.