Mar 25 2020
10:30 am - 11:30 am
Track Names: TRANSPORTATION, Wednesday 10:30 - 11:30
Session Date: Mar 25 2020 10:30 am - 11:30 am
State Highway 10: Oklahoma’s Perfect (mapping) Storm
In late 2018, CEC partnered with the Oklahoma Department of Transportation to undertake a unique survey project to support future engineering efforts. The survey project consisted of an 11 mile stretch of SH-10 in Cherokee County, Oklahoma. This particular stretch of roadway presented multiple challenges, requiring a unique approach to data acquisition. The existing roadway introduced many safety concerns from a conventional survey standpoint. A winding, two-lane highway with no shoulders and many blind areas made a recipe for potential safety issues. Therefore, it was decided that the best approach would be to incorporate CEC’s mobile LiDAR data acquisition methods. However, the topography within the project extent presented additional challenges. While the corridor was not necessarily wide, one side of the roadway consisted of steep cliffs, rock formations, and multiple overhangs, while the other side consisted of steep drop-offs to the abutting Illinois River. To top off these topographic challenges, the corridor was nearly completely roofed in tree cover. Therefore, CEC decided to implement additional collection methods. Due to tree cover, conventional photogrammetric methods were ruled out. Ultimately, CEC’s UAS-based aerial LiDAR system was used to supplement the mobile LiDAR data. In order to maintain safety and meet FAA regulations, the UAS LiDAR data collection was split into 12 separate flights. Due to the corridor having no shoulders and very little suitable ground next to the roadway, establishing survey control targets for the mobile and aerial data collection proved challenging. An intricate control network was designed so that both mobile and aerial methods could utilize shared targets. This combined with conventional survey and lots of checkshots, CEC was able to meet the project accuracy requirements. This presentation will explore the methods used, challenges faced, and the success achieved by using the right tool in the toolbox.
Permanently Mapping Large Network - No longer a dream
The interest of Mobile Mapping Data is no longer to be proven. In the rail industry where acessing the field is difficult and dangerous we have to reduce as much as possible time on the field. Mobile Mapping is a solution to capture the rail environment in a quick and exhaustive way for a lot of use. Mobile Mapping acquisitions in SNCF Reseau started in 2012 and the company acquired its first system in 2013. During 4 years a lot of acquisition were performed (28 000 km). A sharing platform was created by SNCF RESEAU to share all those point clouds to all the company on an easy and friendly way. This platform is named ATLAS. A lot of people started to use point cloud and to see the interest of this kind of data for their project (BIM, track regeneration and small measurments are just a few exemples of what our colleagues are doing with 3D point cloud). During these 4 years my team and I dreamed of having a dedicated train for mobile mapping acquisition. A train with a system permanently mounted, with IT infrastructure on-board, a train driving the 48 000km of track of our network everytime. Now this dream came true ! We installed 3 systems on 3 measuring trains in 2019. The 3 trains covers 200 000km of track per year so the complete network 4 times a year. This project was created first for clearance measurment but also to collect data for other purpose like ballast profil check but most of all to collect data on all the network in order to map the complete network (Numeric Twin, changes detection, vegetation analysis etc...). Collecting data at this rate is clearly different than collecting data for specific jobs. Most of the processes have to be automatized and industrialized. The aim of this presentation is to show an overview of the project and show the development made. Finally some perspective will be presented.
How Data Integration Transforms Transportation Mapping
3D laser scanning, mobile mapping, UAVs—each of these technologies has had a tremendous impact on the ability to quickly and safely capture accurate information for transportation projects. Now, through recent technology advances, it’s possible to integrate data from these and other sensors to provide incredible accuracy and detail with tremendous time savings. Combining terrestrial and mobile lidar with aerial data capture increases safety by keeping people out of harm’s way, prevents roadways from being shut down during data collection, and accelerates the timeline for project completion. Importantly, this approach provides significant intelligence to minimize risk and maximize success. For example, combining the Leica Geosystems terrestrial laser scanners, Leica Pegasus:Two Ultimate mobile mapping system and Leica Aibot aerial data capture platform enabled McGray and McGray to complete a railroad bridge survey in just one and a half days of field time, compared to nine days of field time required to do the work with conventional methods. We’ll walk you through the details of this and other projects and show you how we are consistently able to capture data that meets clients’ high standards for accuracy, detail and speed while adding value to the deliverable with high-resolution ortho images. Discover how data integration with state-of-the-art sensors takes surveying and mapping to a new level of value.
McGray & McGray Land Surveyors, Inc.
Q&A and panel discussions with session presenters
There will be a 15 minute Q&A /panel discussion with the presenters of the Transportation session.