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de Boer, W.P. (author), Mao, Yongjing (author), Hagenaars, Gerben (author), de Vries, S. (author), Slinger, J (author), Vellinga, T. (author)In Africa, several new seaport developments are being considered. In sedimentary environments, such port developments can have adverse impacts on the evolution of adjacent coastlines. To learn from past port engineering practice, we created a unique database containing the coastline evolution and characteristics of 130 existing African seaports....journal article 2019
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Athanasiou, Panagiotis (author), de Boer, W.P. (author), Yoo, Jeseon (author), Ranasinghe, Roshanka (author), Reniers, A.J.H.M. (author)Understanding long-term sandbar dynamics can be crucial for informed coastal zone management, but is often hampered by data availability. To increase the number of sandbar observations available from bathymetric surveys, this study proposes and evaluates a method to manually extract the sandbar location using freely available satellite imagery...journal article 2018
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Hagenaars, Gerben (author), de Vries, S. (author), Luijendijk, Arjen (author), de Boer, W.P. (author), Reniers, A.J.H.M. (author)Measured trends and variability in shoreline position are used by coastal managers, scientists and engineers to understand and monitor coastal systems. This paper presents a new and generic method for automated shoreline detection from the largely unexplored collection of publicly available satellite imagery. The position of the obtained...journal article 2018
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Sihler, Holger (author), Lübcke, Peter (author), Lang, Rüdiger (author), Beirle, Steffen (author), de Graaf, M. (author), Hörmann, Christoph (author), Lampel, Johannes (author), Penning de Vries, Marloes (author), Remmers, Julia (author), Trollope, Ed (author), Wang, Yang (author), Wagner, Thomas (author)Knowledge of the field of view (FOV) of a remote sensing instrument is particularly important when interpreting their data and merging them with other spatially referenced data. Especially for instruments in space, information on the actual FOV, which may change during operation, may be difficult to obtain. Also, the FOV of ground-based devices...journal article 2017
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van Dorp, A.L.C. (author)ARTEMIS (Africa Real-Time Environmental Monitoring Information System) is used by FAQ (Food and Agriculture Organisation of the United Nations) to support both its internal prograimnes on early warning and food security and desert locust control as well as developing countries in Africa by processing image information originating from the...report 1994
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van Ingen Schenau, H.A. (author), Spaa, J. (author)This paper describes aspects of system design applied to the ARTEMIS environmental monitoring system of the Food and Agriculture Organization (FAO) of the United Nations. The design aspects are derived from characteristics of the monitoring function and are based on methods of rainfall and vegetation monitoring from satellite observations which...report 1992
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Roefs, H.F.A. (author), Monkel, A. (author)Project CADISS has produced an elegant breadboard of a system for compression (and -if required- decompression) of signals generated by imaging sensors on-board scientific satellites. The performance, specifications and physical characteristics of CADISS are the result of trade-offs on function (algorithms), technology, through-put speed and...report 1987
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Hogendoorn, R.A. (author)Non-specialist users of data compression often encounter difficulties with the selection of an algorithm, suited for their application. This report tries to facilitate this task by providing the necessary information about the algorithms. Four established, at the National Aerospace Laboratory available algorithms were selected for this study: -...report 1986
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Versteeg, M.H.J.B. (author)This report describes the results of a feasibility study into some aspects of a proposed METEOSAT image data compression unit. The study was performed to support the preparation of a proposal for ESOC. For the considered algorithms (ESTEC 1 & MEANDER 1) an estimate of the needed processing power based on the 68000 instruction set was made. This...report 1986