Volume calculation - Contents of Bins

[PaulT]

Hi,

I am wondering how to calculate the volume of each of the bins in the attached images inside WebODM please?

If I use the volume tool in 2D mode then I can’t select the area of the stockpile and at the same time set the base plane throughout to be the level of the ground at the front of the bin. It seems to set the base plane as an average elevation of the points that I use to define the volume area.

The volume tools in the 3D view are not precise enough to do this.

If it is not possible inside WebODM, where would I need to do it, and is there a tutorial to learn how to do something like this?

Many thanks
Paul

[Jeff_Gaudette]

Hello PaulT,

I think that CloudCompare should be able to help get you the volumes you are interested in.

CloudCompare - Open Source project

It will load in your .las or .laz point clouds generated by WebODM or ODM.

This video demonstrates how it’s done in CloudCompare.
CloudCompare2.5D - LIDARUAV - Calculate the volume of a stockpile Point Cloud
Another option would be to use Civil 3D.
Calculating a Stockpile Volume from Point Cloud Data using Civil 3D
HTH,

Cheers,

Jeff

[PaulT]

Thanks very much Jeff for all the information.
I will have a good look at what you have outlined.

Cheers,
Paul

[PaulT]

I worked out a method that worked well for me.

1. Export Orthophoto RAW from WebODM and Import file into QGIS.

2. Create and save a shapefile inside QGIS of the areas needed to be measured.
   https://www.youtube.com/watch?v=xnS6b7WlWwQ

3. Export Surface model from WebODM (GeoTIFF Raw) and Import file into QGIS

4. Hide orthophoto and place it at the bottom of layers.

5. Follow QGIS Volume Calculation Tool - Plugin Tutorial.
   QGIS Volume Calculation Tool - Plugin Tutorial - YouTube

I verified with easily measurable areas inside WebODM and they matched

[Jeff_Gaudette]

Thank you for posting your workflow (with links) that worked. I will have a look and perhaps modify mine. I am still exploring QGIS’ capabilities.

Cheers,

Jeff

[israelbar]

Hi,

You may want to read this.

Tutorials — OpenDroneMap 2.8.4 documentation

Also consider that once the limits of the stockpile are set in software like QGis, you will find there are some ways to determine the base plane. So for isolated stockpiles which boundaries are mostly visible, a linear approach can be used. While for stockpiles set in slopes or in bins, the base plane is better defined by the lowest point. Creation of a triangulated 3D surface to define the base plane is advised for large stockpiles. This is also valid for stockpiles paced on irregular surfaces.