VTOL drone performs photogrammetry with RTK
In the state of Illinois, US, a solar farm was going to be built by a large energy firm, in the area where the Mississippi joins the Ohio river. During heavy rainfall the banks of the rivers rise, partly flooding the area. Bacon Farmer Workman Engineering and Testing Inc. (BFW) was hired to survey the area. Jacob Cash, a BFW surveyor with over 15 years of experience used a WingtraOne VTOL drone to fly over these challenging wetlands. Aboard the WingtraOne, the AsteRx multi-frequency GNSS receiver delivers reliable centimeter-level positioning information needed for accurate surveying. Cash said that he chose the WingtraOne drone not just for its accuracy of photogrammetry, but also for its reliability, to ensure safety of people on site. Not only was it the wet season, but also the windy season by the river delta. Despite this, Cash was able to survey the site in 6 hours, spread over several days due to limited time windows allowed by the harsh weather conditions. Accurate elevation information and digital terrain models created by BFW allowed optimal placement of solar panels and other equipment, avoiding costs of equipment damage during flooding.