- Multispectral : the imagery needs to be multispectral.
- Two bands is the minimum.
- More bands is better.
- Red to Green : the red to green (600 to 500 nm) part of the visible solar spectrum is where the majority of bands should be placed, with only a few bands outside this range.
- A Panchromatic band may be included, provided it has been acquired concurrently with the spectral bands:
- a Panchro band is a very wide band which may not be used like normal multispectral bands.
- we have successfully used the SPOT PAN waveband, in addition to the normal SPOT XS bands, to extend the modeling depth range from 4-6 m down to 10-13 m in the clear waters of Bora Bora.
- other case studies include Hyperspectral images like
- CASI at Heron Island
- HYPERION at Fakarava atoll,
- HICO at Lee Stocking Island, Bahamas
- Landsat 8, QuickBird and WV2
- Near vertical viewing at high altitude on a "calm and clear" slightly hazy day is best.
- Bathymetry modeling has been tested successfully using
- SPOT XS, Landsat TM, ETM and OLI, IKONOS, QUICKBIRD
- scanned color aerial photography,
- airborne spectrographic imager data (CASI),
- spaceborne spectrographic imager data (HYPERION, HICO).
- FORMOSAT2, THEOS, PLEIADES should all prove to be suitable.
- Digital multispectral video (DMSV) and digital aerial photography should prove to be suitable.
- Spaceborne hyperspectral imagery should prove to be the ultimate source of data for bathymetry modeling in the years to come, subject to ground resolution though.
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