As we mentioned above, surveying companies generally use GCPs, because a high level of global accuracy is important in most of the work that they do. This is important in situations where precision mapping and true global accuracy are needed. That is to say, they help ensure that the latitude and longitude of any point on your map corresponds accurately with actual GPS coordinates. When used correctly, ground control points greatly improve the global accuracy of your drone map. In this map, surveying company Landpoint bypassed a traditional land survey and saved over 80 man hours by using GCPs in their drone map. Because the drone mapping software knows the exact location of each of these “thumbtacks”, it can reference their locations when it matches up all of the other points on the map.Ī ground control point is a large marked target on the ground, spaced strategically throughout your area of interest. It might be helpful to think of your GCPs as a series of thumbtacks placed on your drone map.
Ground control points how to#
(We’ll explain how to do this a little later.) The ground control points and their coordinates are then used to help drone mapping software accurately position your map in relation to the real world around it. If you use ground control points with your aerial map, you first need to determine the RTK GPS coordinates at the center of each. So what exactly are ground control points? Ground control points are large marked targets on the ground, spaced strategically throughout your area of interest. To help crack the code on ground control points, we’ve put together this short guide to using GCPs with drone mapping software. But what exactly are ground control points? And how do you go about using them correctly? Although they are not necessary in every situation, GCPs are a vital tool for precision mapping. Used often in the surveying industry, as well as in virtual design and construction, GCPs greatly increase the global accuracy of drone maps. If you work with drone mapping software, you’ve no doubt heard talk of ground control points (GCPs).
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