气候变化领域集成服务门户(CCPortal): Comparison of four UAV georeferencing methods for environmental monitoring purposes focusing on the combined use with airborne and satellite remote sensing platforms

CCPortal

DOI	10.1016/j.jag.2018.10.018
	Comparison of four UAV georeferencing methods for environmental monitoring purposes focusing on the combined use with airborne and satellite remote sensing platforms
	Padró J.-C.; Muñoz F.-J.; Planas J.; Pons X.
发表日期	2019
ISSN	15698432
起始页码	130
结束页码	140
卷号	75
英文摘要	This work is aimed at the environmental remote sensing community that uses UAV optical frame imagery in combination with airborne and satellite data. Taking into account the economic costs involved and the time investment, we evaluated the fit-for-purpose accuracy of four positioning methods of UAV-acquired imagery: 1) direct georeferencing using the onboard raw GNSS (GNSSNAV) data, 2) direct georeferencing using Post-Processed Kinematic single-frequency carrier-phase without in situ ground support (PPK1), 3) direct georeferencing using Post-Processed Kinematic double-frequency carrier-phase GNSS data with in situ ground support (PPK2), and 4) indirect georeferencing using Ground Control Points (GCP). We tested a multispectral sensor and an RGB sensor, onboard multicopter platforms. Orthophotomosaics at <0.05 m spatial resolution were generated with photogrammetric software. The UAV image absolute accuracy was evaluated according to the ASPRS standards, wherein we used a set of GCPs as reference coordinates, which we surveyed with a differential GNSS static receiver. The raw onboard GNSSNAV solution yielded horizontal (radial) accuracies of RMSEr≤1.062 m and vertical accuracies of RMSEz≤4.209 m; PPK1 solution gave decimetric accuracies of RMSEr≤0.256 m and RMSEz≤0.238 m; PPK2 solution, gave centimetric accuracies of RMSEr≤0.036 m and RMSEz≤0.036 m. These results were further improved by using the GCP solution, which yielded accuracies of RMSEr≤0.023 m and RMSEz≤0.030 m. GNSSNAV solution is a fast and low-cost option that is useful for UAV imagery in combination with remote sensing products, such as Sentinel-2 satellite data. PPK1, which can register UAV imagery with remote sensing products up to 0.25 m pixel size, as WorldView-like satellite imagery, airborne lidar or orthoimagery, has a higher economic cost than the GNSSNAV solution. PPK2 is an acceptable option for registering remote sensing products of up to 0.05 m pixel size, as with other UAV images. Moreover, PPK2 can obtain accuracies that are approximate to the usual UAV pixel size (e.g. co-register in multitemporal studies), but it is more expensive than PPK1. Although indirect georeferencing can obtain the highest accuracy, it is nevertheless a time-consuming task, particularly if many GCPs have to be placed. The paper also provides the approximate cost of each solution. © 2018 The Authors
英文关键词	ASPRS standards; Direct georeferencing; Drone; Indirect georeferencing; Post-Processed Kinematic; UAV
语种	英语
scopus关键词	accuracy assessment; comparative study; environmental monitoring; GNSS; remote sensing; satellite data; sensor; unmanned vehicle
来源期刊	International Journal of Applied Earth Observation and Geoinformation
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156544
作者单位	Grumets Research Group, Departament de Geografia, Universitat Autònoma de Barcelona, Edifici B. Universitat Autònoma de Barcelona, Departament de Geografia Office B1092, Bellaterra, Catalonia 08193, Spain; HEMAV S.L. Edifici RDIT. Office 0007, C\Esteve Terrades, 1. Parc Mediterrani de la Tecnologia, Castelldefels, Catalonia 08860, Spain; Universitat Autònoma de Barcelona, Universitat Autònoma de Barcelona, Departament de Geografia Office B1092. Edifici B, Bellaterra, Catalonia 08193, Spain; Grumets Research Group, Departament de Geografia, Universitat Autònoma de Barcelona, Universitat Autònoma de Barcelona, Departament de Geografia Office B1094. Edifici B, Bellaterra, Catalonia 08193, Spain
推荐引用方式 GB/T 7714	Padró J.-C.,Muñoz F.-J.,Planas J.,et al. Comparison of four UAV georeferencing methods for environmental monitoring purposes focusing on the combined use with airborne and satellite remote sensing platforms[J],2019,75.
APA	Padró J.-C.,Muñoz F.-J.,Planas J.,&Pons X..(2019).Comparison of four UAV georeferencing methods for environmental monitoring purposes focusing on the combined use with airborne and satellite remote sensing platforms.International Journal of Applied Earth Observation and Geoinformation,75.
MLA	Padró J.-C.,et al."Comparison of four UAV georeferencing methods for environmental monitoring purposes focusing on the combined use with airborne and satellite remote sensing platforms".International Journal of Applied Earth Observation and Geoinformation 75(2019).