title: Mapping broom snakeweed through image analysis of color-infrared photography and digital imagery.
abstract: A study was conducted on a south Texas rangeland area to evaluate aerial color-infrared (CIR) photography and CIR digital imagery combined with unsupervised image analysis techniques to map broom snakeweed [Gutierrezia sarothrae (Pursh.) Britt. and Rusby]. Accuracy assessments performed on computer-classified maps of photographic images from two sites had mean producer's and user's accuracies for broom snakeweed of 98.3 and 88.3%, respectively; whereas, accuracy assessments performed on classified maps from digital images of the same two sites had mean producer's and user's accuracies for broom snakeweed of 98.3 and 92.8%, respectively. These results indicate that CIR photography and CIR digital imagery combined with image analysis techniques can be used successfully to map broom snakeweed infestations on south Texas rangelands.
authors.affiliation: USDA-ARS, Integrated Farming and Natural Resources Research, 2413 E. Highway 83, Weslaco, TX 78596, USA. jeveritt@weslaco.ars.usda.gov
authors.forename: J H
authors.initials: JH
authors.lastname: Everitt
authors.forename: C
authors.initials: C
authors.lastname: Yang
mesh_terms: D000401:Aircraft; D019659:Asteraceae; D003116:Color; D007091:Image Processing, Computer-Assisted; D007259:Infrared Rays; D010781:Photography / Q000379:methods; D013781:Texas