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Data Assessment <br />in the valley, additional well data collection will need to be included in the program. This issue is <br />discussed further in chapters 4.0 and 5.0. <br />3.11 Geographic Coverages <br />Spatial representation of data is important in both analysis and modeling for water administration. <br />Much of the data required are available either directly in digital GIS format or as hard copy <br />available for processing. Table 3-4 summarizes GIS coverages by data type, provides a summary <br />of resolution, and assesses quality. <br />Data Assessment: <br />Most data are available for use with the exception of quality solar radiation and evaporation data. <br />Limited point data for these data types prohibit effective map generation. Data of varying <br />resolutions introduce error in map composites. For example, physical descriptions of structures <br />and diversions may not line up with stream networks and topography given the underlying <br />accuracy and resolution of the data at hand. Data would generally be compatible with the existing <br />HydroBase spatial and relational database development. Data collection, processing, and quality <br />assurance would be required in the RGDSS to provide a single database of GIS coverage. <br />a454/report/fmaUdata. doc 7/2&~OS 3 - 15 <br />