|Parker Williams, Amy - UNIVERSITY OF WYOMING|
Submitted to: Society for Range Management Meeting Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: November 21, 2002
Publication Date: February 1, 2003
Citation: Parker-Williams, A.E., Hunt, E.R. 2003. Using hyperspectral remote sensing to map noxious weeds in rangelands: Leafy spurge in northeastern Wyoming [abstract]. In: 56th Annual Meeting of the Society for Range Management Abstracts [CD ROM]. Technical Abstract: Leafy spurge, Euphorbia esula L. is an adventive, perennial weed that infests approximately 1.2 million hectares of land in North America. One of the fundamental needs in leafy spurge management is cost-effective, large-scale, and long-term documentation and monitoring of plant populations. Leafy spurge is a good candidate for detection via remote sensing because the distinctive yellow-green color of its bracts is spectrally unique when compared to co-occurring green vegetation. During 1999, Airborne Visible / Infrared Imaging Spectrometer (AVIRIS) imagery were acquired in northeastern Wyoming and ground vegetation data were collected. Mixture Tuned Matched Filtering (MTMF), a specialized type of spectral mixture analysis, was used to estimate leafy spurge canopy cover and map leafy spurge distribution. Overall performance of MTMF for detecting the presence of leafy spurge in a pixel was 95.2 ± 1.8 percent. Determination of leafy spurge cover for all sites was good (r2 = 0.69). The techniques presented here could possibly be used for constructing leafy spurge distribution and abundance maps with satellite hyperspectral data for larger regional areas.