Wednesday, January 26, 2011

Dick Henderson Animation

I uploaded an animation of our Dick Henderson Bridge collection to YouTube some time ago.  The short video shows the combination of the point cloud information with derived planimetrics of the underneath structure and piers.

I compiled the animation using Pointools with a little transition editing afterwards.  I've been using the software for some time now to generate these animations and to create the screen captures shown in this blog.


Monday, January 24, 2011

Corridor Mapping

Recently we were awarded a contract to perform mapping along a 108 mile corridor through central Louisiana.  Our Mobile LiDAR crew completed the data collection over two days - each day collecting 2 passes in opposing directions.  In order to illustrate the ground covered, I exported the vehicle trajectory to a Google Earth KML file (see below).

Along the corridor, there were several areas where the alignment was uncertain.  Due to the ease of acquiring additional areas, our crew made additional passes to completely capture the necessary information.  The image below demonstrates how our crew made multiple passes along the new US 167 alignment as well as the old alignment.

The Size of Data:

Covering all that ground is bound to create a substantial amount of data.  During the collection, our system acquired 55,727 images.  In addition, we processed 170.3 GB of LAS files.

My colleagues and I are contemplating how many points were collected over that time period.  Would anybody venture a guess?  Feel free to post your guess!  Should I get a number of guesses, I may post the actual number.


Wednesday, January 12, 2011

Mobile LiDAR & GIS: Background of a Service Provider

I have the pleasure of being a contributing author to LiDAR News - a new electronic newsletter by Spatial Media.  My specific focus will be Mobile LiDAR and GIS - with a host of other contributers addressing Aerial LiDAR, Static Scanning and Processing.

My first article is now available and is a basic introduction of things to come.  It may be accessed through this link.  I will be collaborating with other authors when appropriate to address processing, animation and sensor fusion.

Should you have a topic for discussion, please leave as a comment.


What is Mobile LiDAR?

Mobile LiDAR (Light Detection and Ranging) systems are comprised of vehicle-mounted lasers, cameras and GPS/INS navigation systems to capture highly-detailed and accurate three-dimensional (3D) topographic information for surveying and engineering applications. Michael Baker International became an early adopter of Mobile LiDAR technology by acquiring our first system in 2009, with further expansions in 2014 and 2015 that increased our fleet to four (4) Optech Lynx SG1 Mobile LiDAR systems. Over that period our systems have completed more than 300 projects throughout 29 different U.S. States (and multiple countries), and encompassing hundreds of thousands of miles. Our project portfolio includes applications in roadway design, 3D modeling, railroad corridors, signaled intersections, utility infrastructure, asset management, pavement condition assessment and airport infrastructure.