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CRDSS <br />TASK MEMORANDUM 1.06 -1 <br />Spatial Database <br />Spatial Database Requirements <br />1.0 ISSUE <br />The spatial database consists of geo- referenced data stored and manipulated in such a way that the user <br />can display graphical representations of the data. In some cases, the user will be able to select sites, lines, <br />cells, or polygons and query data stored in INFORMIX. <br />The spatial database will be able to display data in three graphical formats: (1) raster maps that are based <br />on a grid system (each cell created by the grid is assigned one value), (2) vector maps that are line <br />segments defined by their end points (connected line segments or polygons can be assigned one value for <br />each polygon), and (3) site maps that are points with an icon representing the location. <br />2.0 DISCUSSION /ANALYSIS <br />The database task leaders have met with the modeling task leaders to determine the data needed for the <br />modeling efforts and to make sure data will be in the correct format for the models as well as for the most <br />efficient storage in the various databases. The task leaders for Task 1. 14, Consumptive Use Model, and <br />Task 1. 15, Water Rights Planning Model, have prepared memoranda that document the spatial data needs <br />of each of these tasks. <br />This document summarizes the spatial data needed by both of these tasks with an emphasis on the <br />Gunnison River basin. The data types are summarized in Table 1.06 -1, and the anticipated population <br />schedule is found in Table 1.06 -2 in Task 1.06 of the scope of work. <br />Tonogranhv /Elevation <br />A Digital Elevation Model (DEM) for the Western Slope of Colorado, which was purchased from the <br />National Oceanic and Atmospheric Administration (NOAA), is already in use at Colorado State <br />University (CSU). Elevation data will be needed for elevation correction of the agricultural <br />evapotranspiration and reservoir evaporation estimates for the consumptive use model and for <br />computation of the lapse rate for temperature adjustments. Population for the Gunnison River basin will <br />be completed by Month 6, Year 1. <br />General Hydrography <br />Surface water features (rivers, ponds, reservoirs, etc.) are described by this coverage. Surface water <br />features are used for the water rights planning model for building networks. General hydrography data <br />are available from Denver Water in ARC /INFO format. Data for the Gunnison River basin will be <br />populated into the CRDSS by the end of Year 1. <br />A275 01.08.95 1 1.06 -1 IDs Group <br />