WEBVTT

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My name's Adam Lewinter . I'm a

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research physical scientist here at the

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Cold regions Research and engineering

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laboratory and I work in the remote

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sensing G . I . S . Center of expertise .

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So my team , the light . Our group at

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the remote sensing G . I . S . Center

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of expertise specializes in . As you

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would imagine , lidar lidar stands for

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light detection and ranging , lidar

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uses light specifically lighter uses

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very fast pulses of laser light

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to measure distances from the sensor to

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an object . And from that by doing it

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really fast we're talking millions of

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pulses per second . You can create a

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very high accuracy high resolution

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three dimensional model of your

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surroundings . So mobile lidar is used

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to capture high resolution , high

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accuracy three D . Models of large

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areas in a short amount of time . So

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for example in the Army Corps were

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interested in some of our civil works

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infrastructure , Levees dams ,

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reservoir infrastructure in order to

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map those . If you're doing a

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traditional survey tripod set up , it's

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going to take you days or weeks to map

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an entire area . Whereas with the

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mobile laser scanning system where

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mobile lidar you can drive it in a

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couple hours even you know , tens of

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minutes and capture an entire area with

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centimeter scale accuracy and

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resolution . The laser scanner we have

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is a dual head laser scanner . So if

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you look up on top there's two scanner

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heads and then there's uh a we call it

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like the octopus of cameras radiating

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out from the base . Inside of this

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scanner housing is the inertial

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measurement unit that's mounted on top

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of this very tall vehicle . The higher

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up we are , the better the field of

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view , the better perspective you know

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it's just like climbing up on top of

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the ladder at a concert . You'd be able

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to see much better than if you're stuck

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behind some six ft five person . And

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then that control box connects to the

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different power sources on the vehicle .

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And then it also connects to the

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drivers or operators display . And

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really it is a one person operation to

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start the system . You turn it on . You

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need to allow the I . M . You to

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essentially bake in and find its

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initial static position as that's

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happening . You're checking on the

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scanner and the cameras and making sure

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there all configured correctly . Then

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you do what's called a dynamic

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alignment , basically perturbing or

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moving the I . M . U . So that it can

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find more precisely it's attitude ,

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it's heading in its direction and its

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position . And then you just start

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scanning . The options are kind of

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limitless . You can create a lot of

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different products and for each project

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and each need the products change

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depending on what the actual focus is ,

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what the measurement is . What's the

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quantification that's needed .

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Yeah