This very much depends on the accuracy you are talking about. Traditional land survey is more accurate on the grounds of point data but there are far fewer points measured which leads to a level of highly professional estimation. With Drone survey there are thousands upon thousands of data points collected, which means volumes, density, gradient and alike are given in a far more accurate format.
Aerial survey is a method of collecting geo-referenced or other imagery by using aeroplanes, helicopters, UAVs, balloons or other aerial methods. … Aerial surveys can provide information on many things not visible from the ground. The 3D modeling of this data leads to a highly measurable, and accurate map of the ground.
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