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O CAD <br />91, will be a good starting point for assigning water supplies to historic irrigated lands. Lands that <br />were irrigated historically via ditches that have been since abandoned will have their water supply <br />determined using historic diversion records, historiic maps and other records. Lands irrigated by <br />groundwater in 2001 will be assessed for each oi.' the historic periods and assigned to a parcel <br />depending on the status (date) of the wells' decree;;. The CU Contractor will provide a list of key <br />diversions for each of the historic periods, and will. provide a list of decreed wells presumed to be <br />operational for irrigation purposes for each historic Ireriod. <br />Deliverables: <br />93.1 A memorandum describing the final recommended technical approach for mapping historic land <br />use. The multi-temporal Landsat satellite imagery., historic aerial photography, and other relevant <br />historic data to be acquired also will be specified. <br />93.2, 93.2, 93.4 & 93.5 A technical memorandum describing the entire process for historic land use and <br />irrigated field boundaries mapping, and assignment of source of water supply, including satellite <br />imagery and other data, image processing and classification, and aerial photo interpretation <br />techniques. <br />93.2, 93.2, 93.4 & 93.5 The following data and information generated under various.. subtasks of Task 93 <br />will be provided for the South Platte and North :Platte River basins for each period of analysis <br />(1950s, 1970s and 1980s): <br />Raster Files <br />1. Satellite Imagery <br />2. Aerial photography <br />3. Classification of irrigated lands .and, where applicable crop type in raster format. <br />4. Interim files for verification of results, such as NDVI. <br />Shapefiles <br />1. Irrigated field polygons <br />2. Land use maps derived from satellite image analysis for 1980s and 1970s, and from <br />photo interpretation and mapping for 1950s <br />3. Crop type for irrigated fields, where applicable <br />4. Water Supply (both surface and groundwater) <br />93.2, 93.2, 93.4 & 93.5 Metadata will be developed for all GIS deliverables developed in this task using <br />Federal Geographic Data Committee (FGDC) compliant metadata format. Included in the metadata <br />will be a description of known data quality problems and a listing of steps involved in developing <br />each GIS coverage and modifications for inclusion in the SPDSS. A description of the QA/QC <br />procedure also will be included along with the persons reviewing the information and the contact of <br />the person responsible for the final review and approval of the product. <br />Task 98 -Mapping, Visualization, and Presentation 'Tools <br />Objective: <br />Develop tools to facilitate ease of use and greater understanding of SPDSS GIS data and results by users. <br />Background: <br />This .activity addresses one of .the primary objectives of the SPDSS -- to format data and results <br />effectively so that they are accessible and understandable by SPDSS users (2.2 Feasibility Study (page 2- <br />3). <br />8 <br />