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SPDSS Memorandum -Final <br />To: Ray Alvarado, Ray Bennett <br />From: Riverside Technology, inc., Graeme Aggett <br />Subject: SPDSS Spatial System Integration Component, for Task 98 -Mapping, Visualization, and <br />Presentation Tools <br />Date: July 11, 2006 <br />1. Introduction <br />This memorandum summarizes activities performed under Task 98 -Mapping, Visualization, and <br />Presentation Tools. Activities are described fully in RTi's Scope of Work (page 8 and 9) for the SPDSS <br />Phase 3 Spatial System Integration Component. The objective of Task 98 is to: <br />Develop tools to facilitate ease of use and greater understanding of SPDSS GIS data and <br />results by users. <br />2. Approach <br />2.1 Data Evaluation and Needs Assessment <br />Sub-Task 98.1 focuses on assessing SPDSS data for visualization and conducting a visualization needs- <br />assessment. Prototypes of data visualization and presentations were prepared, and examples presented to <br />the state along with recommendations. Reporting on this needs assessment is the first and primary focus <br />of this memorandum, which itself is the deliverable for Sub-Task 98.1. <br />2.1.1 Assessing the Status of SPDSS Data for Visualization <br />Irrigated lands and irrigation system geospatial data were readily available for visualization prototypes. <br />Visualization deliverables utilize the latest available version of these data. <br />Raw data describing the surfaces of the various aquifers of the Denver Basin Bedrock Aquifers were <br />supplied by the groundwater contractor in point form (e.g. Figure 1. a). This was pre-processed (clipped <br />and re-projected) and then modeled to create continuous surfaces. The surfaces were then organized in <br />ArcScene to display these surfaces individually for assessment (e.g. Figure 1. b), to ensure the surface <br />appeared sensible. This visualization enabled spurious points to be identified and weeded from the raw <br />dataset, and the surfaces reconstructed. The groundwater contractor was shown the modeled surfaces at <br />the State contractors meeting in October 2005 to confirm that they were reasonable. <br />Figure l.b. Modeled Aquifer Surfaces <br />Page 1 of 7 ~Ixlverslde Technafagy, Inc, <br />Wafer Aescurces Engn~eerrag and Consuffrnq <br />Figure l.a. Raw, Clipped Points Representing <br />Aquifer Surface Elevations <br />