The Resultant Positional Accuracy for the Orthophotos Obtained with Unmanned Aerial Vehicles (UAVs)
| Autor: | Gabriel Popescu, Daniela Iordan, Vlad Păunescu |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Computer science
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 0211 other engineering and technologies 02 engineering and technology Processing photogrammetry remote sensing UAV Computer vision mapping 021101 geological & geomatics engineering computer.programming_language GNSS Pixel business.industry Ground sample distance Orthophoto Geodetic datum 04 agricultural and veterinary sciences General Medicine Drone Photogrammetry GNSS applications 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Artificial intelligence business computer |
| Zdroj: | Agriculture and Agricultural Science Procedia. 10:458-464 |
| ISSN: | 2210-7843 |
| Popis: | This article introduces the fundamentals of positional accuracy to help new practitioners provide these services consistent with professional accuracy standards. Typical products like orthophotos, digital elevation models (DEM), contours, cross-sections and 3D models depend on this understanding of the fundamentals of photogrammetry, remote sensing, GNSS and mapping. Poor operation of the best unmanned aerial vehicle (UAV) can vitiate the positional accuracy of a deliverable. If a drone manufacturer claims their camera is accurate to two pixels for any given ground sample distance (GSD), the resultant positional accuracy for the orthophotos is dependent on each of the factors describe in this paper. The paper aimed to present a list of error sources and describe the major contributors of error for positional accuracy with practical examples using new ASPRS standard, “Geospatial Data Accuracy and the New Mapping Accuracy Standard”. We consider to present few important considerations about the resultant positional accuracy for the orthophotos obtained with unmanned aerial vehicles (UAVs), using the new standard of the American Society of Photogrammetry and Remote Sensing (ASPRS) which is the major standards body for this profession. Positional accuracy means the accuracy of the position of features, including horizontal and vertical positions, with respect to horizontal and vertical datums and, as a conclusion, positional accuracy for the orthophotos, obtained with unmanned aerial vehicles (UAVs), is a product of the entire drone system (aircraft, sensors, operation, and processing software) not any single component. Another conclusion is that, today, flying a UAV with a non-metric camera and without any ground control points, it is impossible to achieve a high level of positional accuracy. |
| Databáze: | OpenAIRE |
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