Ag. Thomson et al., GROUND AND AIRBORNE RADIOMETRY OVER INTERTIDAL SURFACES - WAVEBAND SELECTION FOR COVER CLASSIFICATION, International journal of remote sensing, 19(6), 1998, pp. 1189-1205
Airborne remote sensing using a Compact Airborne Spectrographic Imager
(CASI) has been used to map intertidal surfaces (vegetated and unvege
tated at low tide) on the East Coast of England for the Land-Ocean Int
eraction Study (LOIS). This paper describes how ground radiometry with
a Spectron spectroradiometer has been used to examine spectra for a r
ange of surfaces and to compare different CASI bandsets for discrimina
tion of different classes of intertidal vegetation and sediments. CASI
in spatial mode records data in up to 14 programmable wavebands in th
e visible and near-infrared spectral range. Different CASI bandsets ha
ve been devised for different purposes (some within this project with
the aid of Spectron data). A range of these bandsets are compared on s
imulated CASI data derived from Spectron ground radiometry. Principal
component analysis and discriminant analysis show that these CASI hand
sets are capable of separating spectra from 10 key surfaces, but that
the various bandsets differ little in their effectiveness and that pre
cise waveband selection is not critical.