Suitability of Unmanned Aerial Vehicles for Cadastral Surveys

S. Mantey
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引用次数: 5

Abstract

Cadastral surveys in Ghana often employ well known surveying equipment such as Total Station andGNSSreceivers or a combination of both. These survey techniques are well-established and widely accepted. However, there are limitations in certain areas. In situations where difficult terrain and inaccessible areas and dense vegetation are encountered or when surveyor’s life may be at risk, Unmanned Aerial Vehicles (UAVs) could be used to overcome the limitations of these well-established survey instruments. This research used high resolution images from UAV (DJI Phantom 4) to survey plots within the University of Mines and Technology land area. Coordinates of the boundary points were extracted using Agisoft Photoscan.GNSSreceivers were also used to survey the land and the same boundary point coordinates obtained and compared. This enabled the establishment of accurate ground control points for georeferencing. The coordinates obtained from both UAV andGNSSSurveys were used to prepare cadastral plans and compared. The difference in Northings and Eastings from UAV andGNSSsurveys were +0.380 cmand +0.351 cmrespectively. These differences are well within tolerance of +/-0.9114 m(+/-3 ft) set by the Survey and Mapping Division (SMD) of the Lands Commission for cadastral plans production. This research therefore concludes that high resolution images from UAVs are suitable for cadastral surveying. Keywords: Unmanned Aerial Vehicles, Drones, Global Navigation Satellite Systems, Cadastral Surveys
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无人驾驶飞行器在地籍测量中的适用性
加纳地籍测量通常使用众所周知的测量设备,如全站仪和gnssreceiver或两者的组合。这些调查技术已经建立并被广泛接受。然而,在某些领域存在限制。在遇到地形复杂、难以进入的地区和茂密植被的情况下,或者当测量员的生命可能处于危险之中时,可以使用无人机(uav)来克服这些成熟的测量仪器的局限性。这项研究使用来自无人机(DJI Phantom 4)的高分辨率图像来调查矿业大学土地区域内的地块。使用Agisoft Photoscan提取边界点坐标。同时利用gnssreceiver对土地进行测量,得到相同的边界点坐标并进行比较。这样就可以建立精确的地面控制点进行地理参照。利用无人机和gnsssurvey获得的坐标编制地籍图并进行比较。无人机和gnsssurvey的norththings和Eastings的差异分别为+0.380指挥+0.351指挥。这些差异完全在土地委员会测绘处(SMD)为制作地籍图而设定的+/-0.9114米(+/-3英尺)的公差范围内。因此,本研究得出结论,无人机的高分辨率图像适用于地籍测量。关键词:无人机,无人机,全球卫星导航系统,地籍测量
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