<div dir="ltr"><pre>If you can export your file as a las/laz file (or it also takes PolyCam's zip file of a laz file), <br>then I have a place where you can preview it using the <a href="http://potree.org">potree.org</a> software. <a href="https://las.nix.how/">https://las.nix.how/</a><br><br>Try using the shortcode: c0987 to see a scan that was made underwater using photogrammetry.<br><br></pre><pre>The potree software converts the pointcloud into streamed data, so it doesn't matter how <br>massive your starting scan is as it only loads a limited amount.<br></pre><pre>This is used as the starting point for tunnelvr, should you choose to use it for tracing <br></pre><pre>up your scan into a 3D map representation.<br> <br></pre><pre>Julian.<br><br><br></pre></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 29 Nov 2023 at 13:28, Bill Gee <<a href="mailto:bgee@campercaver.net">bgee@campercaver.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello everyone -<br>
<br>
This is probably more of a general practices question than something <br>
specific to Therion. Among the group there is likely to be some <br>
experience with this. I hope at minimum someone can guide me to a place <br>
for further learning.<br>
<br>
A few years ago Apple released a very high-end smartphone which has a <br>
LIDAR feature (iPhone 12 Pro). There are a few more models now which <br>
have it. I have heard of some people using this to create cave maps. <br>
There is much I do not understand.<br>
<br>
Has anyone in the group taken the point cloud from an Apple LIDAR scan <br>
and turned it into a Therion cave map? If so, I am very interested in <br>
the details of the process.<br>
<br>
The biggest issue I see is this: How does the iPhone know where it is? <br>
There is no GPS in a cave. GPS is not accurate enough even if it did <br>
work. Inertial navigation also has big problems dealing with a cave <br>
environment.<br>
<br>
There are many other issues, but I think that is the big one.<br>
<br>
Thanks!<br>
<br>
-- <br>
===============<br>
Bill Gee<br>
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</blockquote></div>