Marine remote sensing toolkit

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BRG The University of Queensland
Fundamentals

- Main page
- Pre-processing
- Field data collection
  - Benthic sampling
  - Spectral libraries
    - Example spectra
  - Optical water properties
  - Bathymetry
  - Control points
  - Features mapping
- Mapping approaches
- Change and trends
- Delivery

# Spectral library collection method

Spectral libraries are collections of spectral reflectance signatures representing benthic features that frequently occur in a study area. These data are collected to:

- Determine if features can be differentiated from each other based on reflectance signatures (Hochberg et al 2003; Leiper in press, Siebeck et al 2006)
- as input for mapping algorithms that match pixel values to target spectral reflectance signatures;

Spectrometers are used to collected the spectral signatures of the benthic features that make up the spectral library. There are several methods for acquiring spectral signatures e.g. spectrometer build in underwater housing, or those operated from the surface.

## References:

Roelfsema, C. M., J. Marshall, E. J. Hochberg, R. S. Phinn, A. Goldizen and J. Joyce (2006). Underwater Spectrometer System 2006 (UWSS04). St.Lucia, Centre for Remote Sensing and Spatial Information Science. University of Queensland.

Hochberg, E. J., M. J. Atkinson and S. Andréfouët (2003). "Spectral reflectance of coral reef bottom-types worldwide and implications for coral reef remote sensing." Remote Sensing of Environment 85(2): 159-173.

Siebeck, U. E., N. J. Marshall, A. Kluter and O. Hoegh-Guldberg (2006). "Monitoring coral bleaching using a colour reference card." Coral Reefs 25(3): 453-460.

LEIPER, I.A. and PHINN, S.R., (in-prep), Spectral reflectance of coral reef communities: a more appropriate scale and mapping unit? International Journal of Remote Sensing.