Volume measurement with DroneDeploy is an extremely fast, accurate and cost-effective method to analyze volumes on your maps from any device. User tests have found that, when following best practices, DroneDeploy's volume measurements are accurate within 1-2% of traditional ground-based laser measurements.
Below we'll walk you through best practices for how to use the volumetric tool, what the calculations mean, and how to provide feedback.
Topic in this article:
Adding Volume Capabilities to a Map
The volumetric analysis tool is available to all Lite, Individual, Advanced, Teams and Enterprise customers. Learn more about our paid subscription plans or start your Individual trial today.
Selecting an Area and Measuring its Volume
In order to define a volume to measure, you first need to select an area for which to compute the volume.
- Choose the
Volumeicon from the
Annotation & Measurementoptions:
- Add points around the stockpile for which you want to compute the volume.
- Adjust the points until you are happy with the area of interest. Here is an example result:
- Using the cross arrows in the middle, you can shift the area of interest in order to automatically recalculate the result.
Selecting the Right Base Plane
Choosing the appropriate base plane will help you ensure that you are recording accurate measurements.
There are three base-plane options available for volume calculation; Linear Fit, Lowest Point and Triangulated.
Measuring on Different Layers
Sometimes it can be difficult to see the base of a stockpile when looking at the Orthomosaic image, due to shadows or similarly colored surrounding areas. To more easily see the nuances in the terrain, we recommend using the Elevation Toolbox as the base layer of the map when computing volumes.
Below is an example that demonstrates why using the Elevation Toolbox is a best practice when calculating volumes. In the Orthomosaic (on the left) it is difficult to see the small pile of rocks to the left of the stockpile. Defining the base layer on top of the small rock pile would lead to inaccurate volume calculations. Using the Elevation Toolbox (on the right), the small pile becomes easily viewable, enabling you to avoid defining a point of the base on top of the rocks.
Creating identical annotations is important for change-over-time mapping. For instance, if you have piles changing on a daily, weekly, or monthly basis you may want to consider copying annotations from map to map. This can be done natively within our app! Find this in the annotations drop down of the left panel:
For more detailed instructions on how to copy annotations, click here: Copy Annotations
Importing Annotations Now AvailableYou now also have the ability to import annotations from a selected map into a current map. This is done in the same way we copy annotations; simply select that option from the drop-down menu.
Congrats! You have now copied annotations from a previous flight. Now, when you compare those measurements, you will be comparing the same area, location and volume, thus resulting in the most accurate change-over-time calculations!
You can now duplicate your Annotations within the same map!
1. Click on the Annotation you would like to duplicate
2. Click on the Duplicate button at the top of the left side panel - this will automatically duplicate your annotation on the map!
Understanding the Calculations
The volume calculations between the base-plane and the terrain surface of your area of interest is given in terms of the volume that would need to be removed (in the case of a stockpile) and/or added (in the case of a hole) in order to flatten the surface so that it's the same as the surrounding ground.
Cut vs. Fill
Cut refers to the volume you would have to remove from the area (a pile) in order to flatten it (e.g., you're cutting off the pile).
Fill corresponds to the volume you would have to haul in, to "fill" a hole, in order to flatten the area.
Cut and Fill volumes are automatically shown on the map when calculating volumes. The actual Volume measurement calculation is Volume = Cut - Fill.
Volume Measurements Over Time for GCP Maps
For Individual, Advanced, Teams, and Enterprise customers, you also have access to the Stockpile Report. This will compile your material and volume data in a concise and professional report.
Stockpile AI is a new machine-learning feature that automatically finds stockpile boundaries in your map to save you time.
This feature is available exclusively on our enterprise accounts.
=For more detailed information on Stockpile AI, click here: StockPile AI