sand mine vol calc

it seems every time i try to repeat the vol measure i get a wild diffrent result

This is from cloud compare using the point clouds

the first image is 6 months after the secont one

but the volume decreases

Let me check

11/13/2025 was set to high res

Others on default

I just set all 3 to high and am restarting

for the base surface, I would probably use the triangulation method, making sure to have sufficient points defining the triangulated surface

thats what ive been using, @YanNoun pointed out i had diffrent options so im trying high res for all 3 and will try again

im thinking i want my points to include the piles around the pit so that im only measuring material taken away on dump trucks

you have to be careful though, it's a large hole and the base surface has a really large impact on the measurement; you might want to use cloudcompare if you want more control over it

so maybe my best option would be to really hug pit with my points>

?

once these are done recomputing on high res ill do a vol calc on all 3 and you can take a look

we are having a horse show in a few minutes so ill have to send the output in a few

thank you for your help so far

my boss wants to use these results in court as the sand mine is very illegal\

not sure how that will go

When comparing volume, do i want to draw a new boundary for each one ore draw one for the biggest one and reuse it on the smaller ones?

i think these are pretty good

shows a steady amount of sand removed and passes the sanity check as on weekdays more than 1 full dump truck leaves every day

unless you're using GCPs I would draw a new one

One more thing @pierotofy I have a point cloud of the landmine from a lidar survey I can't find a way to use it for volume calculation

You need a DSM or DTM to perform volume calculations using the 2D tools

could you break it down barny style for me?

meaning you can't use the lidar survey directly

if you can generate a surface model from the lidar survey in GeoTIFF and import that into Lightning, then you can do volume measurements

do you know of any such tools?

Cloud Compare

GeoTIFF must have a valid CRS

im getting this error when trying to inport from cloud compare

i cant seem to find a way to assign it

ok hold the phone

how do theses numbers make any sense

https://cloud1.webodm.net/public/task/93acdb3f-a8e1-4a02-baf7-46639cc39ac6/map/?t=dsm

https://cloud1.webodm.net/public/task/6d4d5b44-9e63-47f1-87a2-89bca7987e80/map/?t=orthophoto

the first one is a scan from 2013

and then 2026

volume is larger in 2013

but size is smaller and the altitude of the bottom is the same

Mm, not sure. But your Task of 2026-06-02T17:30:30.133Z task seems to have a different resolution as well as a different base surface. I would look there.

p.s. please no @ mentions for help questons 🙏 this is a public place for discourse for everyone, pinging people directly does not help speed up the response

My apologies for the @

The task is from a lidar scan, but it all seems to look Okey and lines up with satilite images from the time

But these volume calculations are double expected

And the 3d view if cut and fill seems normal

well boys, im hiring a guy on fiver to do my point cloud anal

I've opened a new help thread with more examples of the issue