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Open Map and Elevation tabs to Add new sources and Upload orthomosaics (GeoTiff) or elevation data (Figure 2).įigure 2 Adding new sources and uploading orthomosaics (GeoTiff) or elevation data to UgCS Open Map layers to upload a map or elevation data (Figure 1).įigure 1 Open Map layers to upload a map or elevation data into UgCS If that’s the case pilots can upload this data into UgCS and make more accurate flight planning. Pilots may also have orthomosaics and/or elevation data from surveys or satellite data providers. Step two: import an accurate map and elevation data to UgCS (optional)īy default, UgCS provides access to a variety of online tiles services and SRTM elevation data. Given the maximum allowed altitude, the highest possible GSD, in this case, could be just 2.3 cm. The problem is that in most countries maximum allowed UAV altitude (without special permission) is limited to 120 m/400 ft AGL (above ground level). To meet such GSD the drone has to fly at 510 meters above the ground. For example, a GSD of 10 cm/pixel is required, but a drone is going to carry a Sony A7 III camera with a 24 MP sensor. GSD should be set according to the desired digital map parameters. This is very bad practice, as small GSD means longer flight time, hundreds of photos for each acre, tens of hours of processing, and heavy output files. Very often aerial photogrammetry newbies are excited about making a digital map with extremely high resolution (1-2 cm/pixel) and use very small GSD for mission planning. Overlap can be increased for areas with vertical surfaces or highly uniform visual surfaces (desert, snow). The overlap should be chosen according to specific conditions of the survey area and requirements of drone data processing software.īy default, 60% forward and 30% side overlap are the minimum recommended settings. Pilots can either draw survey boundaries manually in UgCS or import them from a KML. Table 1 GSD affecting the detalisation level of acquired data Below are examples of how a car may look like in the pictures with different GSDs GSD affects the level of detail of acquired data.
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GSD and area boundaries usually are defined by desired customer output (e.g., digital map scale and resolution). It is the distance measured in centimeters between the centers of two neighboring pixels in the image on the ground surface. GSD is the spatial resolution of a sensor.
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UgCS ensures professional land survey mission planning using the photogrammetry technique. UgCS supports almost any UAV platform, provides convenient tools for areal and linear surveys, and enables direct drone control.
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UgCS by SPH Engineering is a globally known UAV mission planning and flight control software solution. Drones can approach areas unreachable by foot or by car.UAV equipment is less expensive than traditional land survey equipment.
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With real-time kinematic (RTK) and post-processed kinematic (PPK) technologies, there is no need to place ground control points (GCP) for many applications Main UAV advantages compared to traditional survey solutions Drones and cameras evolve amazingly quickly, however, the output accuracy and precision of resulting products strongly depend on the flight planning software. Unmanned Aerial Vehicles (UAV) or drones revolutionize mapping services and help generate accurate orthomosaics, point clouds, and elevation models faster. UgCS Photogrammetry tool for UAV Land survey missions Step six: PPK processing and image geotagging (optional).Step four: deploy ground control points (optional).Reducing the number of waypoints during AGL flight.Step two: import an accurate map and elevation data to UgCS (optional).Main UAV advantages compared to traditional survey solutions.UgCS Photogrammetry tool for UAV Land surveying missions.