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MEMO -TASK 89.1 <br />Table 1: Summary of reviewed studies <br />No. Author Study Name C1asTficetion Study Area <br /> <br /> Irrigated Lands Assessment Irrigated lands <br /> Using Satellite Imagery in the 2 <br />1 Agro Engineering, Inc. 1,509 miles <br /> Rio Grande Basin of Crop types <br /> Colorado <br /> Western Slope Irrigated Irrigated lands <br /> Spatial Sciences and Refresh Project for the Approx. 39,000 <br />2 <br /> Imaging Colorado Decision Support Crop type miles <br /> System <br />3 Maxwell and Hoffer Mapping Agricultural Crops <br />with Multi-Date Landsat Data Crops types 256 miles2 <br /> An Examination of the <br />4 Vieira and Mather Effectiveness of <br />Multitemporal Crop Crop types Not specified <br /> Classification <br />5 NCWCD N/A Irrigation lands 23,500 miles <br /> Crop types <br /> Using Satellite Imagery to <br />6 Williams and Eckhardt Inventory Irrigated Lands in Irrigated lands 113 <br />000 miles <br /> the Upper Colorado River , <br /> Basin <br /> Mapping and Monitoring <br />7 Congalton et al. Agricultural Crops and Other Crop types Lower Colorado <br /> Land Cover in the Lower River Basin <br /> Colorado River Basin <br /> Automated Crop Type <br />8 Maxwell et al. Mapping from Landsat Corn 13,086 miles <br /> Imagery <br /> <br />9 Martinez-Beltran and Irrigated Crop Area <br />Estimation Using Landsat TM <br />Irrigated lands z <br />3 <br />125 miles <br /> Calera-Belmonte Imagery in La Mancha, Spain , <br /> Classification of Irrigated <br />10 Qi et al. Land Using Satellite Imagery, Irrigated lands 174,000 miles <br /> the High Plains Aquifer <br /> Mapping of Center Pivot <br /> Irrigation in Colorado. <br />11 Cipra et al. Colorado Water. Newsletter Irrigated lands 104,247 miles <br /> of the Water Center at <br /> Colorado State University <br />Spatial Sciences and Imaging (2002), classified irrigated parcels in the Western Slope Irrigated Refresh <br />Project for the Colorado Decision Support System, using a Tasseled Cap transformation (Kauth and <br />Thomas 1976, Crist and Cicone 1984) of single date Landsat 5 and 7 data. From the Tasseled Cap <br />transformation, spectral profiles were developed and thresholds were defined to separate irrigated from <br />non-irrigated lands. The results of this procedure were then used as a visual aid to manually map field <br />boundaries on high-resolution Digital Ortho Quads (DOQQ) or 15-meter panchromatic Landsat TM <br />satellite data. These boundary maps were provided to water commissioners who corrected the field <br />boundaries, and assigned crop type and water supply information to the fields. The crop information was <br />then used to develop spectral signatures in a Maximum Likelihood classification procedure for producing <br />field maps. The reported absolute overall accuracy for the irrigated classification ranged from 89 percent <br />to 93 percent for the western slope Water Divisions 4, 5, 6 and 7. In the case of the crop-type <br />Page 2 of 13 ~-~~versfde TecAnafagy, lnc. <br />W:rler Resources Frr~mec.•rng ,end L'nr+surlrn2 <br />