XXII ISPRS Congress 2012: Technical Commission VII

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Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663821976

Title:: Technical Commission VII

Scope:: 546 Seiten

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663821976

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B7)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VII/7, III/2, V/1, V/3, ICWG V/I: LOW-COST UAVS (UVSS) AND MOBILE MAPPING SYSTEMS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: AERIAL TERRAIN MAPPING USING UNMANNED AERIAL VEHICLE APPROACH K. N. Tahar

Document type:: Multivolume work

Structure type:: Chapter

nned aerial ect georef- hotogram- grammetry m. is, Institute rland. M., 2009. Vs. DGPF its impact )09, Dieter nted mon- video im- of the Pho- 1 Sciences, 229-1236. les (UAVs) Archives of formation [. Part Bl, 11. Perfor- tion. Inter- ensing and AV-g 2011, cs, Zurich, cation and Rhombos- International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B7, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia AERIAL TERRAIN MAPPING USING UNMANNED AERIAL VEHICLE APPROACH K. N. Tahar Dept. of Surveying Science & Geomatics, Faculty of Architecture, Planning & Surveying Universiti Teknologi MARA,40450 Shah Alam, Selangor, Malaysia - nizamtahar @ gmail.com KEY WORDS: Mapping, Analysis, Camera, Accuracy, Aerial, Photogrammetry ABSTRACT: This paper looks into the latest achievement in the low-cost Unmanned Aerial Vehicle (UAV) technology in their capacity to map the semi-development areas. The objectives of this study are to establish a new methodology or a new algorithm in image registration during interior orientation process and to determine the accuracy of the photogrammetric products by using UAV images. Recently, UAV technology has been used in several applications such as mapping, agriculture and surveillance. The aim of this study is to scrutinize the usage of UAV to map the semi-development areas. The performance of the low cost UAV mapping study was established on a study area with two image processing methods so that the results could be comparable. A non-metric camera was attached at the bottom of UAV and it was used to capture images at both sites after it went through several calibration steps. Calibration processes were carried out to determine focal length, principal distance, radial lens distortion, tangential lens distortion and affinity. A new method in image registration for a non-metric camera is discussed in this paper as a part of new methodology of this study. This method used the UAV Global Positioning System (GPS) onboard to register the UAV image for interior orientation process. Check points were established randomly at both sites using rapid static Global Positioning System. Ground control points are used for exterior orientation process, and check point is used for accuracy assessment of photogrammetric product. All acquired images were processed in a photogrammetric software. Two methods of image registration were applied in this study, namely, GPS onboard registration and ground control point registration. Both registrations were processed by using photogrammetric software and the result is discussed. Two results were produced in this study, which are the digital orthophoto and the digital terrain model. These results were analyzed by using the root mean square errors and mean absolute error to determine the level of accuracy and the precision of photogrammetric products. It can be concluded that the new method of image registration by using the GPS onboard of the UAV produces medium accuracy result compared to the method that uses the ground control point. This new method can be used for the medium accuracy requirements. Unmanned Aerial Vehicle can be used for several applications, which requires a medium accuracy. 1. INTRODUCTION 1.1 Related Works Unmanned aerial vehicle is extremely potential in mapping field and provide high data accuracy. There are many types and designs of UAV that are available in the market. UAV can collect images from wide range from O — 2000 kilometer of flight altitudes (UVSIA, 2010). In many countries the aviation regulation limit the altitude and visibility (line) of sight) is required to the UAV. UAV also offers the same concept of image acquisition like manned flight but it does not required onboard pilot during flight mission. UAV can be deployed rapidly and it gives high resolution images for spatially limited areas. UAV also has the potential in surveillance missions (David et al, 2008; Dingus et al., 2007) and aerial tracking for various purposes and in a variety of applications. Many studies have investigated the capabilities of UAV in agricultural mapping using multispectral Sensor in order to classify the plantation in term of health condition (Grenzdorffer et al. 2009; Herwitz et al, 2004). However, the integration between UAV and multispectral instruments require many modifications due to the payload limitation and endurance hour of the UAV. UAV has also been used in urban area mapping by producing a layout map of the urban area. The layout can be used by many organizations for strategic planning in the urban area (Jwa and Ozguner, 2007). This product could be used for city planning to direct sustainable development in certain area. Fixed wing UAV can be operated autonomously or under radio control by operator. In some cases, autonomous flight control could be less accurate in term of conducting the flight plan due to the UAV turbulence which is affected by wind direction (Osborne and Rysdyk, 2005). However, one advantage of autonomous flight mission is that it can be used for large study area without any concern of the human eyes' limitation. However, the local aviation regulations are to be taken in to consideration. Manual and autonomous flight needs the similar amount of control, by checking the path conducting, and possible anomalies in the instrumentation on UAV from the beginning until the end of flight mission. The safety of UAV relies on the skill of the operator during flight mission. Unfortunately, manual flight mission is unable to cover large area due to the limitation of the human eyes. A fixed wing unit such as cropcam has been assembled with a complete package for flight mission. It includes autopilot chip, electronic speed controller (ESC), GPS onboard, Camera mount, gyro, wireless modem and high resolution camera

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