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Abstract
Seasonal Crop Classification in Central Washington with Landsat-TM Imagery
Track: Agriculture
Author(s): Pat Daly
Annual crop acreage and aerial distribution data supports improved cultivation management practices in three counties in central Washington's Columbia Basin where agriculture activities have been linked to elevated levels of groundwater nitrates. This paper presents a process developed to identify major crops on more than two million acres during cultivation season using 30-meter Landsat TM satellite images and GIS. Multispectral classification used field training sets, multitemporal images, and more than 31,000 field boundaries to classify 23 crops. Classification accuracy was 84 percent overall, and exceeded 93 percent for several crops. Areas of relative leaching potential were determined using crop inputs to a Leaching Index.
Pat Daly
Franklin Conservation District
1620 Road 44 N.
Pasco , WA 99301
USA
Phone: 509-545-8546 x3
Fax: 509-547-2007
E-mail: pat-daly@wa.nacdnet.org