Accurate Stockpile Calculations?

[HammerMissions]

Anyone conducting stockpile volume calculations?

What are the parameters giving you the most accurate results?

We recently undertook a field test study to better understand the relationship between GSD and accuracy of the volume calculations.

Accuracy of Stockpile Volumes from Drones Images | Hammer Missions

In this study, we look at how accurate are the stockpile volume calculations from drone images, 3D models and hammer missions.

www.hammermissions.com

Curious to learn what others have found so far.

 

[Dave Pitman]

Have you run your image set through other processors?
For real-world projects, even .35cm gsd is not practical.

 

[HammerMissions]

Hi Dave, contrary to popular belief, we're finding that there is no "absolute GSD" at which you can expect to get good results. A good GSD itself a function of what you are looking to measure and how "big" or "small" it should appear in the images for accurate results. However, on relative terms, lower GSD helps and after a certain limit the accuracy plateaus

Would love to hear thoughts and be good if you can share more!

 

[Gagey52]

Thanks for sharing, the .35cm, or about 3.5 millimeters, have I got that right?
Regards

 

[HammerMissions]

Thanks for sharing, the .35cm, or about 3.5 millimeters, have I got that right?
Regards

That's correct. In this dataset, 0.35cm / 3.5mm per px yielded an OK result, however, much more accurate results were obtained at 0.18cm / 1.8mm per px. The optimal GSD might vary depending on the size of what you're measuring!