[OpenDroneMap-dev] Fw: [OpenDroneMap-users] Mesh Plotter for LidarLITE

[Stephen Mather]

Dakota got a Lidar Lite from a friend... . I think affordable lidar
scanners are going to rapidly become the norm, so we need to think through
how they fit in to the photogrammetric workflow. Here are my initial
thoughts:

LiDAR is cool, but requires accurate position and orientation info. Good
sensors for position and orientation are expensive. Anecdotally, great
orientation sensors are $20k. For RTK GPS, one can use Piksi at $1000 or
other units at $10k and up, but this is still expensive.

I think the solution is to calculate the position and orientation of the
sensor from photogrammetric info combined with GPS, and then use that to
reverse calculate the LiDAR point cloud. I don't know yet what the accuracy
will be, we'll at least be able to test the accuracy of photogrammetric
positions (XYZ, but not orientation) from ODM if we use a dataset with RTK.

Thoughts?
Best,
Steve




On Thu, Nov 19, 2015 at 1:09 PM, Dakota Benjamin <
dmb2 at clevelandmetroparks.com> wrote:

> I think this is an interesting development problem space.
>
>
> [image: http://sig.cmparks.net/cmp-ms-90x122.png]Dakota Benjamin
> Geospatial Developer
> clevelandmetroparks.com <http://www.clemetparks.com/>
>
>
> <http://www.clemetparks.com/>
>
> <http://www.clemetparks.com/>*"It is not down in any map; true places
> never are."*
>       Herman Melville
>
>
>
> ------------------------------
> *From:* OpenDroneMap-users <opendronemap-users-bounces at lists.osgeo.org>
> on behalf of Andrew Jawitz <andrewjawitz at gmail.com>
> *Sent:* Thursday, November 19, 2015 11:41 AM
> *To:* opendronemap-users at lists.osgeo.org
> *Subject:* [OpenDroneMap-users] Mesh Plotter for LidarLITE
>
> Hello All,
>   I have an update and a question regarding my ongoing experimentation
> with the LidarLITE...
>   I've been searching and searching for months for a project sample that
> uses the LL for 3D Mapping but apparently there were so many problems with
> the original i2C library in particular that hardly anyone could get it to
> work.  Finally, I found this tutorial-
>
> http://myrobotlab.org/content/lidar-lite-distance-measurement-and-creating-point-cloud
> <http://myrobotlab.org/content/lidar-lite-distance-measurement-and-creating-point-cloud>
>  which seems to be a good starting point.  If you want a good chuckle
> check out the comment thread which has all of these veteran robotics guys
> scratching their heads trying to figure out how this guy got up and running
> so easily.  FWIW it looks like the official documentation had just been
> updated to include a recommendation for this alternate i2C Library-
> http://www.dsscircuits.com/index.php/articles/66-arduino-i2c-master-library
>   Ironically it only works with the original LL (which I have) and not the
> updated "Blue Label" version...
>
>   Anyway, after loading the alternate i2C Library, I managed to get the
> sketch to compile on Arduino 1.6.6 and sure enough coordinates started
> popping up on the serial monitor!  I can create a project gist with all the
> code if others would like but for now you can find the sketch I'm using on
> my sketchbook repo-
> https://github.com/Cribstone/Arduino-Sketchbook/blob/master/LidarLitePointCloud/LidarLitePointCloud.ino
>   If you were wondering where to find the source for the Processing Sketch
> referenced in the article, I was able to find it here-
> http://borsaci06.com/Plot_LidarScanner.pde
>  While, I was able to compile this sketch in Processing 3.0, it threw out
> a list of Java-related errors when I tried to start it(Enough to remind me
> why I'll go so far out of my way to avoid Java)...
>
>   So that leads to my question...  Would it be possible to plot point
> clouds from an Arduino i2c/serial port using ODM in place of Processing?
>
> *http://cribstone.github.io/about/* <http://cribstone.github.io/about/>
>
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