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. (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. This eliminates the need for personnel to be put in potentially dangerous situations.If you work with drone mapping software, you’ve no doubt heard talk of ground control points (GCPs). Drones can help create a detailed map of a roof. Inspectionĭrone pilots primarily use cameras to visually inspect equipment, but photogrammetry can also assist in inspection. With their expertise and the possession of high-quality equipment like RTK GPS units, Cole Surveying & Design can produce extremely accurate, high-resolution, almost real-time maps for their clients. SurveyingĬole Surveying & Design can create a highly accurate map with photogrammetry that can easily be turned into a 3D topographic map with contour data-a process that used to be extremely tedious. These maps help construction managers obtain the “big picture” and assist in strategic decision making. Cole Surveying & Design’s maps can be used to regularly update clients in the construction industry on the progress of their projects, analyze quantities stockpiles of raw materials, such as dirt and gravel, or even generate 3D models of construction sites. The construction industry greatly benefits from drone mapping. Here are some ways the information and analysis provided by mapping systems are helping Cole Surveying & Design utilize our UAV services to reach new heights of accuracy and efficiency in the surveying industry. In addition, surveys conducted by our drones are even more effective because Cole Surveying & Design can integrate our eyes in the sky with surveying and mapping software. The ability to deploy rapidly, collect real time information and survey areas that might be otherwise dangerous to access are some of the advantages of aerial surveying. With the advent of new technology, we are now able to utilize a UAV/Drone as another tool to aid in mapping. Traditionally, survey data of a construction or urban development site is collected by a ground based, manned survey team. We show our client’s buildings and the landscape as they are in their current state, not as they were months or even years ago. With UAV/Drone aerial imagery, Cole Surveying & Design can create premium-quality images and real-time accuracy and content. The images are lower-quality, unclear and sometimes outdated. Other aerial photo resources including, NC One and Google Maps, can be an effective tool, but the quality and accuracy are inadequate to truly assist in design or construction. Aerial photography via UAV is a versatile and fresh approach.
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