If you fly with a common consumer drone such as a DJI Phantom 4 Pro, the on-board GPS receiver creates geotags with accuracy between five and 10 meters, which is perfectly suitable for high-accuracy mapping provided that adequate ground control is also used to tie down your data.

However, photos taken from certain drones expose geotags that are accurate down to 2cm (0.75in) through employment of an on-board Real Time Kinematic (RTK) or Post-Processed Kinematic (PPK) GPS module. 

Specialized off-the-shelf drones such as the SenseFly eBee range, certain DJI setups and some custom-built drones sport this hardware.

Propeller assumes the default accuracy level to be that of a standard, uncorrected drone setup, but high-accuracy geotagged photos can also be processed automatically. 

After selecting your photos, you need only tell us that your submitted photos have high-accuracy geotags in the Create new dataset flow, by checking the box as below.

IMPORTANT: it is required that your images are tagged with Latitude, Longitude and height above the ellipsoid, in meters. 

A word of caution—it is important to ensure that this option is not selected if you are not certain your tags have been corrected. 

If you are unsure or would like to know more about achieving accurate data with your drone, check our support knowledge base or reach out to our data specialist support team.

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