Detecting Tamarisk species (Tamarix spp.) in riparian habitats of Southern California using high spatial resolution hyperspectral imagery

Remote Sensing and Mapping of Tamarisk along the Colorado River, USA: A Comparative Use of Summer-Acquired Hyperion, Thematic Mapper and QuickBird Data

“…High-spatial-resolution measurements of green or red along with near-infrared reflectance yielded substantial improvement in K hat , similar to the results of earlier studies which relied on airborne hyperspectral data [8,16]. Multispectral data at a 2.5 m GSD (QB) proved more effective in tamarisk mapping than either the same bands (TM5) or hyperspectral data (Hyperion) at 30 m GSD.…”

“…Also, there were few ground plots containing 80-100% tamarisk coverage that were of sufficient size to yield 30 m GSD reference pixels. In contrast, the combination of high spectral and spatial resolutions previously enabled high-accuracy mapping of tamarisk in the De Beque area [15] and in Southern California [16] and has been useful in monitoring the biological control of tamarisk in Nevada [8].…”

“…In determining the effectiveness of biological control of tamarisk in several western USA states from airborne hyperspectral imagery acquired at 1-2 m GSD during early July and late August, near-infrared (768 or 777 nm), green (539 or 548 nm) and red (653 or 670 nm) spectral bands were most useful [8]. Similarly, the selection via hierarchical clustering of 569 nm, 702 nm, 719 nm and 770 nm spectral bands from airborne hyperspectral imagery acquired at 0.5 m GSD yielded optimal detection of tamarisk in Southern California [16]. Acquired from earth orbit at 30 m GSD, data from NASA's EO-1 Hyperion [17] were used to classify tamarisk in Western Nevada, USA [18].…”

Remote Distinction of A Noxious Weed (Musk Thistle: CarduusNutans) Using Airborne Hyperspectral Imagery and the Support Vector Machine Classifier

“…The literature indicates that there is a growing body of work on the hyperspectral mapping of non-native invasive species [50][51][52][53][54][55][56][57]. Most of the previous hyperspectral remote sensing studies dealing with mapping invasive plants have commonly utilized Airborne Visible Infrared Imaging Spectrometer, HyMap and Compact Airborne Spectrographic Imager images with spectral resolution ≥ 10 nm and spatial resolution ≥ 1.5 m. In addition to this, spectral angle mapper and mixture tuned matched filtering were commonly employed as the classification algorithms after dimension reduction or transformation of hyperspectral data, such as principal component analysis, minimum noise fraction or vegetation indices.…”

“…Some of the non-native invasive species frequently distinguished and mapped in the USA include saltcedar (Tamarix spp.) [33,52,58,59], leafy spurge (Euphorbia esula L.) [51,56,57], spotted knapweed (Centaurea maculosa Sam.) [32,48,53] and yellow starthistle (Centaurea solstitialis) [50,54,55].…”