People > Dr Daniel Clewley

Dr Daniel Clewley

Airborne Earth Observation Data Analyst

Contact Details

+44 (0)1752 633100


Dan Clewley manages the NERC Earth Observation Data Acquisition and Analysis Service (NEODAAS) at PML and is responsible for day to day operation of the service and overseeing new developments.

Dan gained his first degree in Physics before deciding to specialise in Remote Sensing. He gained his PhD from Aberystwyth University on modelling and inversion of backscatter models to estimate forest structure and biomass from Synthetic Aperture Radar (SAR).

His main research interest is the use of Earth Observation data to classify and characterise terrestrial vegetation and changes in these over time, with a particular focus on woodlands and wetland ecosystems. His areas of expertise are: SAR data, LiDAR data, airborne data processing (including calibration and geocorrection), GIS and development of software for geospatial data processing.


Rehabilitation of Vibrio-infested waters of Lake Vembanad, funded under the India-UK Water Quality programme (REVIVAL)

Contact: Dr Shubha Sathyendranath

Lake Vembanad is the largest body of water in Kerala, India, stretching almost 100km in length and spanning an area of over 2000km2. Its shores are...

GCRF Blue Communities
GCRF Blue Communities

Contact: Professor Melanie Austen

GCRF Blue Communities is a 4 year research capacity-building programme for marine planning in East and South-East (E/SE) Asia, funded by UK...

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Other key projects


Selected key publications

  • Clewley, D., Whitcomb, J.B., Akbar, R., Silva, A.R., Berg, A., Adams, J.R., Caldwell, T., Entekhabi, D. and Moghaddam, M., 2017. A Method for Upscaling In Situ Soil Moisture Measurements to Satellite Footprint Scale Using Random Forests. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.
  • Clewley, D.; Whitcomb, J.; Moghaddam, M.; McDonald, K.; Chapman, B.; Bunting, P. Evaluation of ALOS PALSAR Data for High-Resolution Mapping of Vegetated Wetlands in Alaska. Remote Sensing. 2015, 7, 7272-7297.
  • Lucas, R.M, Clewley, D., Accad, A., Butler, D., Armston, J., Bowen, M., Bunting, P., Carreiras, J., Dwyer, J., Eyre, T., Kelly, A., McAlpine, C., Pollock, S. and Seabrook, L. 2014 Mapping Forest Growth Stage in the Brigalow Belt Bioregion of Australia through integration of ALOS PALSAR and Landsat- derived Foliage Projective Cover (FPC) data. Remote Sensing of Environment. Volume 155. Pages 42-57.
  • Clewley, D., Bunting, P., Shepherd, J., Gillingham, S., Flood, N., Dymond, J., Lucas, R., Armston, J., and Moghaddam, M. A Python-Based Open Source System for Geographic Object-Based Image Analysis (GEOBIA) Utilizing Raster Attribute Tables. Remote Sensing 2014, 6, 6111-6135.
  • Bunting, P.J., Armston, J., Lucas, R. M., and Clewley, D. 2013. Sorted pulse data (SPD) library. Part I: A generic file format for LiDAR data from pulsed laser systems in terrestrial environments. Computers & Geosciences, 56, pp.197–206.
  • Bunting, P.J., Armston, J., Clewley, D., and Lucas, R. M. 2013. Sorted pulse data (SPD) - Part II: A processing framework for LiDAR data from pulsed laser systems in terrestrial environments. Computers & Geosciences, 56, pp.207–215.

Other activities

Blog: Spectraldifferences - Tips and tutorials for GIS and remote sensing,