Monitoring extreme hydrological events and their effects Dresden, - PowerPoint PPT Presentation

Monitoring extreme hydrological events and their effects Dresden, 29.08.2013 Dresden, 29.08.2013 using lightweight unmanned aircraft for remote sensing Justyna Jeziorska, Tomasz Niedzielski, Matylda Witek Department of Geoinformatics and Cartography University of Wroc ł aw, POLAND

INTRODUCTION UAV AERIAL IMAGES ORTHOPHOTOS STUDY AREA RESULTS CONCLUSIONS PLANS Presentation overview Presentation overview Introduction Introduction Introduction Methods Methods Methods Unmanned Aerial Vehicle (UAV) Unmanned Aerial Vehicle (UAV) Unmanned Aerial Vehicle (UAV) Photogrammetry from aerial imagery Photogrammetry from aerial imagery Photogrammetry from aerial imagery Ortophotomaps Ortophotomaps Ortophotomaps Study area Study area Study area Results Results Results Conclusions Conclusions Conclusions Further research Further research Further research Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Introduction Introduction How can we aquire spatial measurements? How can we aquire spatial measurements? How can we aquire spatial measurements? Terrestial surveying Terrestial surveying Terrestial surveying high resolution high resolution time and labour ‐ ‐ consuming consuming time and labour Aerial and satellite Aerial and satellite Aerial and satellite susceptibility to mistakes susceptibility to mistakes photogrammetry photogrammetry photogrammetry topographic restriction topographic restriction large area imagery available large area imagery available resolusion often insufficient resolusion often insufficient no control over acquiring photos no control over acquiring photos mapping large areas in short time mapping large areas in short time expensive aerial surveys expensive aerial surveys certified pilots needed certified pilots needed topographic restrictions topographic restrictions (airport needed) (airport needed) Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Introduction Introduction  incorporating the UAV into the HydroProg  incorporating the UAV into the HydroProg  incorporating the UAV into the HydroProg test a new concept of combining spatial combining spatial test a new concept of test a new concept of combining spatial prediction with its aerial verification n prediction with its aerial verification prediction with its aerial verificatio Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Introduction Introduction incorporating the UAV incorporating the UAV incorporating the UAV  into the HydroProg  into the HydroProg  into the HydroProg test a new concept of test a new concept of test a new concept of combining spatial combining spatial combining spatial prediction with prediction with prediction with its aerial its aerial its aerial verification n verification verificatio Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Unmanned Aerial Vehicle (UAV) Unmanned Aerial Vehicle (UAV) Comprehensive UAV system swinglet CAM swinglet CAM Comprehensive UAV system swinglet CAM Comprehensive UAV system a. Fixed ‐ ‐ wing UAV wing UAV a. Fixed ‐ wing UAV a. Fixed endurance: 1 flight ≈ ≈ 30 min endurance: 1 flight 30 min endurance: 1 flight ≈ 30 min ultra ‐ ‐ light: 0,5 kg light: 0,5 kg ultra ‐ light: 0,5 kg ultra wingspan: 80 cm wingspan: 80 cm wingspan: 80 cm b. ground control station b. ground control station b. ground control station ‐ notebook with ‐ notebook with ‐ notebook with a dedicated software a dedicated software a dedicated software c. radiomodem c. radiomodem c. radiomodem d. remote control d. remote control d. remote control e. on ‐ ‐ board 12MP camera board 12MP camera e. on ‐ board 12MP camera e. on Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Close range oblique aerial imagery Close range oblique aerial imagery No vertical photographs No vertical photographs No vertical photographs No metric camera No metric camera No metric camera Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Ortophotomap generation (1) Ortophotomap generation (1) AERIAL PHOTOGRAPHS AERIAL PHOTOGRAPHS geometry not eligible for quantitative measurements (topographic displacement, tilt and sometimes camera lens distortion) ORTHORECTIFICATION PROCESS ORTHORECTIFICATION PROCESS changing the perspective projection of a photo changing the perspective projection of a photo into the orthographic position into the orthographic position FINAL PRODUCT FINAL PRODUCT Geometric correctness of the orthophotomap orthophotomap Geometric correctness of the (can be treated as cartometric material) ) (can be treated as cartometric material Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Ortophotomap generation (2) Ortophotomap generation (2) WORKFLOW WORKFLOW WORKFLOW DIGITAL DIGITAL SURFACE SURFACE Manual Manual MODEL MODEL editing editing Bundle Block Bundle Block Adjustment Adjustment Stereosampling Stereosampling geotagging geotagging orthorectifying orthorectifying (point clouds) (point clouds) ORTHOPHOTOMAP ORTHOPHOTOMAP Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Study area Study area ł odzko County K ł K ł odzko County is located in the Central and odzko County is located in the Central and is located in the Central and Eastern Sudetes, K Eastern Eastern Sudetes, Sudetes, in the SW Poland SW Poland in the in the SW Poland ł odzka Nysa K ł Nysa K ł odzka The rivers of the region are The rivers of the region are the the Nysa K odzka and its key tributaries and its key tributaries The rivers of the region are the and its key tributaries Topography and the extensive hydrographic network extensive hydrographic network contribute to contribute to Topography Topography and the extensive hydrographic network contribute to and the rapid and catastrophic floods floods rapid and catastrophic rapid and catastrophic floods The data recorded by the Local System for Flood Monitoring Local System for Flood Monitoring, , which which The data recorded by the The data recorded by the Local System for Flood Monitoring, which was created in this county, , are transmitted every 15 minutes was created in this county are transmitted every 15 minutes was created in this county, are transmitted every 15 minutes Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Results (1) Results (1) Missions Missions Missions Multiple missions Multiple missions Multiple missions • • • over chosen gauges, over chosen gauges, over chosen gauges, frequency weather ‐ ‐ frequency weather frequency weather ‐ • • • ‐ dependent dependent ‐ dependent ‐ Products of geoprocessing Products of geoprocessing Products of geoprocessing Orthophotomaps: resolution ≈ ≈ 3 cm/px Orthophotomaps: resolution 3 cm/px Orthophotomaps: resolution ≈ 3 cm/px Digital Surface Models: resolution ≈ ≈ 11 cm/px 11 cm/px Digital Surface Models: resolution ≈ Digital Surface Models: resolution 11 cm/px Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek

Results (2) Results (2) Fluvial changes Fluvial changes Fluvial changes Orthophotomap sequence Orthophotomap sequence Raw images (aerial photos) Raw images (aerial photos) Monitoring extreme hydrological events and their effects using lightweight unmanned aircraft for remote sensing Justyna Jeziorska (justyna.jeziorska@uni.wroc.pl ), Tomasz Niedzielski, Matylda Witek