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<br />Table 2. Assessment of Data Applicable for Current and Historic <br />Land Use Classification and for Irrigation Water Service Areas <br /> <br /> Main <br /> APllication <br />Data Type Source Format, data Spatial Temporal Main Use Main Limitation Overall <br />- .. " .. description Coverage Coverage Utility <br /> c '" .- '" .. <br /> .. = ... = " <br /> l:", .s", .- " <br /> ;. .. <br /> = c .ra = ... ... <br /> U.$ ::1:.$ J5< <br />Maps of 30m raster, derived Extent of Crop types not identified, <br />NCWCD * from satellite NCWCD 1997 not field verified, year Mod <br />irrigated lands imagery irrigation 1997. covers NCWCD <br /> Vector files, derived General land Does not discriminate <br />Regional water NCWCD * from land use maps. NCWCD 1990s use irrigated lands, year 1996, Low <br />demand study satellite imagery categories covers NCWCD east to <br /> Kersey <br />National Land 30m raster. derived Entire study Land use and <br />Cover Data USGS * from satellite area when 2000 Not available until 2005 V Low <br />(NLCD) imagery complete land cover <br />Colorado Tabular data, County-wide Summary Not mapped to parcel <br />agricultural State * * summarized by for entire Annual data for Low <br />statistics county study area comparison level, aggregate data <br /> Farm Data reported by <br />Farm Service Service producers, mapped About half of Input for About 50% of irrigation <br />Agency reports Agency on NHAP irrigated Annual classification crops reported, not Mod <br /> photography. areas in the verified, not geo- <br />and maps (formerly unrectitied, mostly study area ' verification referenced~ <br /> ASCS) from 1980s <br />Multi- One season Acquired over a period of <br />resolution 30m Raster data, Generalized <br />Land USGS * derived from satellite Entire study during the land use and 6 years, not yet field Low <br />Characterizatio imagery area period land cover verified, irrigated areas <br />n (MRLC) 1988-94 not explicitly segregated <br /> Vector format, <br />Land Use and USGS, derived from aerial Entire study Generalized Irrigated areas not <br />Water Res. * photo interpretation Late 1970s land use and segregated from other V Low <br />Land Cover Div. and satellite imagery, area land cover agriculture <br /> I :250,000 scale <br /> <br />. <br /> <br />. <br /> <br />Page 6 of 26 Pages <br />