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<br />,.II ~i.'i-' I'll <br /> <br />South Platte Water Rights Management System <br /> <br />nature of the elements. Coordinates which locate map elements are in meters, within the <br />Universal Transverse Mercator (UTM) coordinate system. The digital maps were <br />compiled and developed by CADSWES using ArclInfo software, a proprietary geographic <br />information system (GIS). These maps exist as binary files which are accessed by <br />SPWRMS at run-time to generate graphical map displays in the application interface. <br /> <br />Each map is a distinct layer of information which covers the entire project area. The <br />layering approach allows independent display of the various types of information. Within <br />the SPWRMS application. layers of spatial data fall into two broad groups: those used for <br />building the in-memory data structure upon which SPWRMS operates, and those used for <br />display only. <br /> <br />Three spatial data layers. listed below. form the basis of the SPWRMS in-memory data <br />structure and are loaded by the application during initialization. Data from these layers are <br />read in at initialization for both the SGI and PC SPWRMS applications (even though the <br />PC application does not support graphical display of map layers). <br /> <br />Layer Coverage Name Coverage Type <br />streams ph5_network linear <br />stream gages ph5_stream-1l point <br />diversion structures ph5_structs point <br /> <br />Table 3: Spatial Data Layers (in-memory data) <br /> <br />The remaining spatial layers, listed below, are available within the SPWRMS application <br />for display purposes only. These layers provide locational reference so that the user can <br />more easily discern position on the map display. <br /> <br />Layer Coverage Name Coverage Type <br />aqueducts pM_aqueducts linear <br />ditches pM_ditches linear <br />reservoirs ph4 reserv linear/polygon <br />streams ph5 network linear <br />other streams ph4 other s linear <br />recharge areas ph4 recharge point <br />water district boundaries ph5_district linear <br /> <br />Table 4: Spatial Data Layers (display only) <br /> <br />Data Development History <br /> <br />Data development within most layers proceeded in two phases. Data were first compiled <br />along the main stem of the South Plaue River and its tributaries upstream from the conflu- <br />ence of St. Vrain Creek. This area within the South Plaue River basin was used as a <br />testbed during the prototype phases of SPWRMS software development. The remaining <br />area, which includes the downstream portion of the main stem. St. Vrain Creek. the <br />Poudre and Big Thompson Rivers, and North and South Boulder Creeks. was finished <br />during Phase VI (1993-94) of SPWRMS development. <br /> <br />14 <br /> <br />Database Manual <br />