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Old 09-09-2010, 12:13 AM   #1
windsprinter
 
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Default Sprinter in LiDAR

Out at a remote jobsite last spring, the GIS/Surveyor techs asked if I wanted the Sprinter scanned. This is with LiDAR, Light Detection and Ranging (kind of like Radar but with laser beams) that gives very precise measurements (usually to real-world coordinates, so this Sprinter could be placed on Google Earth precisely where the scanning was done. Each dot has x,y and z coordinates in UTM!). The quarter-million $ machine measures points to a mm accuracy a few mm to a few cm apart, giving amazingly detailed measurements and images of the ground, a building, a Sprinter etc.

You can see the individual measurement points as rows of dots, as the laser scanned back and forth. THe solid 'white' parts like on the door or the Mercedes badge area are where they got the instrument to do very tight measuring, so the dots are overlapping (until you zoom in). On the colourized versions where there is a colour change, the instrument has detected a different material type as part of its remote sensing capability.

The bottome is fuzzy or missing in places because there was grass in the way and the instrument couldn't 'see' the van.

Anyway, kind of fun, I didn't get a screen cap of the inside looking out, etc. I'll try and do that soon.
Attached Images
File Type: jpg Van 1 900.jpg (76.4 KB, 296 views)
File Type: jpg Van 2 900.jpg (136.6 KB, 254 views)
File Type: jpg Van 3 900.jpg (51.3 KB, 238 views)
File Type: jpg Van 4 900.jpg (106.9 KB, 224 views)
File Type: jpg van 5 900.jpg (139.8 KB, 241 views)

Last edited by windsprinter; 09-09-2010 at 03:57 AM.
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Old 09-09-2010, 12:21 AM   #2
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Default Re: Sprinter in LiDAR

One more....
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File Type: jpg van 6 900.jpg (102.5 KB, 244 views)
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Old 09-09-2010, 07:42 AM   #3
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Default Re: Sprinter in LiDAR

Interesting. How big is the machine?

It is cool that they asked whether you wanted it scanned, but what brought up the idea?
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Old 09-09-2010, 08:45 PM   #4
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Default Re: Sprinter in LiDAR

Well, machine is several times larger than a standard laser theodolite like most land surveyors use - and instead of doing one single shot at a time, it does tens of thousands per second! Here is a pic of the place it was scanned at - pretty spot on the Peace River just east of the Rockies, agricultural field in the background. The instrument is beside the kneeling tech; there are several 'spheres' placed around the area that are precisely tied in to coordinates using other survey equipment, that calibrate the scan. Most of the time is spent tying in the survey; the actual scan goes amazingly fast, considering its the equivalent of taking millions of individual survey points - no place for a rod-man any more!

It came up because we'd travelled for about 1200 km together by then and they knew the Sprinter was my baby, and the operator had been telling me about scanning his Second World War military bikes for fun.
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Last edited by windsprinter; 09-09-2010 at 08:50 PM.
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Old 09-29-2019, 04:57 AM   #5
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Default Re: Sprinter in LiDAR

Do you know what machine they used? The colorization is quite neat.

I scanned my van with my GeoSLAM horizon- I plan to push this pointcloud to mesh to model and CAD sketch... perhaps begin to 3D print some components as well.

I did not colorize this scan, but perhaps the next one.

https://i.imgur.com/YhXbUsH.jpg
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