What is the accuracy of SR Measure?

Many factors influence the accuracy of a pile measurement, including toe and base errors, unit weight conversion, and limitations on pile visibility such as vegetation or equipment obstructions. 

If you are measuring bunkers or bins, errors in physical dimensions of the walls will also impact results. 

With an iPhone 12 or newer and control over these variable conditions, SR Measure is accurate to within 5% of the volume of a stockpile. 

Using cones will increase your accuracy to within 1.6%.

How do I used safety cones to improve my accuracy?

Cones are best for precise results if the cones are placed at a specific distance to avoid scaling errors. Two orange safety cones can be used to increase your accuracy to within 1.6%.

Download our guide on how to use cones.

What happens if my camera can't see all of the pile?

If parts of the pile are not visible, the result may be understated. The app displays a 3D visualization with red on surface areas that the camera did not see. The app predicts the surface for these areas and estimates a volume. Users will improve the accuracy and precision of measurements by capturing as much of the pile surface as possible.

Learn How Surfaces are Estimated in SR Measure

Will SR Measure work for stockpiles in bins and bunkers?

Yes. You can unlock bunker measurements with a monthly or annuals paid subscription.

Can I download measurement reports or share them via the cloud?

A Professional subscription does not have access to sharing or downloading measurements.

Users with an Enterprise subscription can download measurement reports in their Stockpile Reports Dashboard. Visit the Stockpile Reports website to learn more.

Can I measure stockpiles in units other than cubic yards?

Yes, you can measure in cubic feet, cubic yards, or cubic meters. The unit of measure is set in the Account tab.

Do I need to see the entire pile in the picture at one time?

No. There are dashed guidelines during the video measurement that assist you in optimal framing of the peak and the toe (top and bottom) of the pile as you walk around it.

This distance is close enough for the system to detect the pile’s surface texture. You will see some sky and foreground, but the stockpile should take up about two-thirds of the space in your camera view.

Should I use horizontal or vertical orientation with my iPhone?

Vertical orientation is best as results are more reliable because it is easier to capture the entire pile as it helps keep the peak and toe of the pile in view.

What if I am interrupted by vehicle traffic?

Follow local site requirements for pedestrian safety and vehicle and equipment traffic. 

If a vehicle needs to pass between you and the pile while you are measuring, stop in place and keep the camera pointed at the pile in a fixed position until the vehicle passes completely. Pause both before and after the vehicle passes, and then continue taking your measurement. 

How Does SR Measure Determine the Base of the Stockpile?

SR Measure’s patented algorithms detect thousands of points on the stockpile surface to determine where the pile meets the ground. The app then creates a ground plane to fit the bottom of the stockpile. This ground can curve and up and down to match the real life ground level around the stockpile.

Can SR Measure work indoors?

Yes, with sufficient lighting. The app does not require GPS data, making it a convenient option for indoor stockpile measurement.

Is there a pile size or shape limitation?

The SR Measure app does not have restrictions on pile size or shape.