A5103271783- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Coastal and Marine Management
- Land Rights and Reforms
- Remote-Sensing Image Classification
- Land Use and Ecosystem Services
- Remote Sensing and Land Use
- 3D Surveying and Cultural Heritage
- Water Quality Monitoring and Analysis
- Coral and Marine Ecosystems Studies
- Archaeological Research and Protection
- Geochemistry and Geologic Mapping
- Conservation Techniques and Studies
- Calibration and Measurement Techniques
- Water Quality Monitoring Technologies
- Species Distribution and Climate Change
- Geological and Geophysical Studies
- Forest Management and Policy
- Fisheries and Aquaculture Studies
- Marine and coastal ecosystems
- Soil Geostatistics and Mapping
- Environmental Sustainability and Technology
- Advanced Image Fusion Techniques
- Neurological Complications and Syndromes
- SARS-CoV-2 and COVID-19 Research
University of Cape Town
2024
Groote Schuur Hospital
2024
Flemish Institute for Technological Research
2008-2020
In May 2019, Collection 2 of the Copernicus Global Land Cover layers was released. Next to a global discrete land cover map at 100 m resolution, set fraction is provided depicting percentual main types in pixel. This additional continuous classification scheme represents areas heterogeneous better than standard scheme. Overall, 20 are which allow customization maps specific user needs or applications (e.g., forest monitoring, crop biodiversity and conservation, climate modeling, etc.)....
Airborne remote sensing with a CASI‐550 sensor has been used to map the benthic coverage and bottom topography of Pulau Nukaha coral reef located in Tanimbar Archipelago (Southeast Moluccas, Eastern Indonesia). The image classification method adopted was performed three steps. Firstly, five geomorphological components were identified using supervised spectral angle mapping algorithm combination data collected during field survey, i.e. cover type, percentage depth. Secondly, for each...
The primary objective of this paper is to describe the validation a parametric model (C-Fix) designed estimate basic carbon mass fluxes forests in Belgium. Most efforts literature are based on point measurements. Since landscapes Belgium quite heterogeneous, spatial up-scaling measurement level sensor pixel crucial issue. Process models often have large set input variables, some them hardly available or not measurable regional basis; other hand most process possess prognostic capacity. C-Fix...
Abstract Atmospheric correction plays a crucial role among the processing steps applied to remotely sensed hyperspectral data. comprises group of procedures needed remove atmospheric effects from observed spectra, i.e. transformation at-sensor radiances at-surface or reflectances. In this paper we present different in process for APEX data as by Central Data Processing Center (CDPC) at Flemish Institute Technological Research (VITO, Mol, Belgium). The MODerate resolution TRANsmission program...
Water body detection worldwide using spaceborne remote sensing is a challenging task. A global scale multi-temporal and multi-spectral image analysis method for water was developed. The PROBA-V microsatellite has been fully operational since December 2013 delivers daily near-global synthesis with spatial resolution of 1 km 333 m. Red, Near-InfRared (NIR) Short Wave InfRared (SWIR) bands the atmospherically corrected 10-day images are first Hue, Saturation Value (HSV) color transformed...
Background. At Groote Schuur Hospital in Cape Town, South Africa, the number of deceased organ donors has declined over past 2 decades, necessitating a more liberal approach to donor selection. In 2007, measures expand kidney pool were implemented, including an HIV positive-to-positive transplant programme and utilisation extended-criteria as well after circulatory death (DCDs). Objectives. To report on our institutional experience with DCD transplants encourage this among other African...
For maintaining the tidal waterways in Scheldt basin, including rivers Rupel and Durme a large part of Nete catchment, for ecological monitoring mud flats, salt marshes riverbank vegetation, Flemish government needs detailed maps these their bank structures. These indicate not only vegetation types, plant associations sediment types but also hard structures, such as quays, locks, sluices roads. Different remote sensing techniques were used to collect data necessary produce required maps....
This paper discusses results from 12 months of a Round Robin exercise aimed at the inter-comparison different cloud detection algorithms for Proba-V. Clouds is critical issue satellite optical remote sensing, since potential errors in masking directly translates into significant uncertainty retrieved downstream geophysical products. Cloud particularly challenging Proba-V due to presence limited number spectral bands and lack thermal infrared bands. The main objective project was several over...
PROBA-V (PRoject for On-Board Autonomy–Vegetation) was launched in May-2013 as an operational continuation to the vegetation (VGT) instruments on-board Système Pour l’Observation de la Terre (SPOT)-4 and -5 satellites. The first reprocessing campaign of archive from Collection 0 (C0) 1 (C1) aims at harmonizing time series, thanks improved radiometric geometric calibration cloud detection. evaluation C1 focuses on (i) qualitative quantitative assessment new detection scheme; (ii)...
Bertels, L.; Houthuys, R.; Deronde, B.; Janssens, Verfaillie, E., and Van Lancker, V., 2012. Integration of optical acoustic remote sensing data over the backshore-foreshore-nearshore continuum: a case study in Ostend (Belgium).This research addresses possibilities combined use airborne hyperspectral imaging spectroscopy, laser scanning, seaborne sonar to sediment dynamics back-, fore-, nearshore continuum. In May 2009, light detection ranging (LiDAR) were acquired at low tide beach Ostend,...
This paper studies the potential of airborne hyperspectral imagery for classifying vegetation along Belgian coastlines. Here, aim is to build maps using automatic classification. Besides a general linear multiclass classifier (Linear Discriminant Analysis), several strategies combining binary classifiers are proposed: one based on hierarchical decision tree, Hamming distance between codewords obtained by and coupling posterior probabilities. In addition, new procedure proposed spatial...
This study focused on the need of accurate digital surface models rather than existing terrain for geometric correction high spatial resolution images over forests. Based both theoretical and experimental results, it was shown here that even close to nadir observations (view angles less 7°), error increased from within beyond pixel level when not taking into account canopy height. is particularly relevant forest studies bidirectional effects, data fusion change detection techniques. The...