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Combination of Aerial, Satellite, and UAV Photogrammetry for Mapping the Diachronic Coastline Evolution: The Case of Lefkada Island

Department of Geology, University of Patras, 265 04 Patras, Greece
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ISPRS Int. J. Geo-Inf. 2019, 8(11), 489; https://doi.org/10.3390/ijgi8110489
Received: 23 August 2019 / Revised: 24 September 2019 / Accepted: 4 October 2019 / Published: 30 October 2019
(This article belongs to the Special Issue Applications of Photogrammetry for Environmental Research)
Coastline evolution is a proxy of coastal erosion, defined as the wasting of land along the shoreline due to a combination of natural and/or human causes. For countries with a sea border, where a significant proportion of the population lives in coastal areas, shoreline retreat has become a very serious global problem. Remote sensing data and photogrammetry have been used in coastal erosion mapping for many decades. In the current study, multi-date analogue aerial photos, digital aerial photos, and declassified satellite imagery provided by the U.S. Geological Survey (USGS), Pleiades satellite data, and unmanned aerial vehicle images were combined for accurate mapping of the southwestern Lefkada (Ionian Sea, Greece) coastline over the last 73 years. Different photogrammetric techniques were used for the orthorectifation of the remote sensing data, and geographical information systems were used in order to calculate the rates of shoreline change. The results indicated that the southwest shoreline of Lefkada Island is under dynamic equilibrium. This equilibrium is strongly controlled by geological parameters, such as subsidence of the studied shoreline during co-seismic deformation and mass wasting. The maximum accretion rate was calculated at 0.55 m per year, while the respective erosion rate reached −1.53 m per year. View Full-Text
Keywords: photogrammetry; remote sensing; air photos; Pleiades; declassified satellite imagery; UAV; coastline; Lefkada Island photogrammetry; remote sensing; air photos; Pleiades; declassified satellite imagery; UAV; coastline; Lefkada Island
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Nikolakopoulos, K.; Kyriou, A.; Koukouvelas, I.; Zygouri, V.; Apostolopoulos, D. Combination of Aerial, Satellite, and UAV Photogrammetry for Mapping the Diachronic Coastline Evolution: The Case of Lefkada Island. ISPRS Int. J. Geo-Inf. 2019, 8, 489.

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