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A <br />i *« X <br />: ^ ‘ <br />'•- : <br />% • I • • <br />. *\M- <br />i-: rr* * > <br />. . I ’ »I ‘ i i <br />26 June 1996 <br />Mr. Mike Gaffron <br />Assistant Planning and <br />Zoning Administrator <br />City of Orono <br />Post Office Box 66 <br />Crystal Bay. MN 55323 <br />RE: Detailed descriotion of the coverages identified by the City of Orono as the ultimate city GIS <br />database . <br />Dear Mr. Gaffron: <br />It was a pleasure to meet with you and your intern last Wednesday 19 June 1996. From our <br />discussion it was clear to me that the City of Orono herein referred to as the City has a vision of a <br />for a comprehensive and furictional GIS. Dahlgren, Shardlow. and Uban, Inc. herein referred to as <br />DSU is happy to be assisting the City to create that database. <br />The following is a detail description of what it will take l ' create each of the coverages that the <br />City identified for completion in its GIS database. This du«cription will hopefully allow DSU and the <br />City to be on the same page when we discuss each of the coverages. <br />BASE DATA COVERAGES <br />Two Foot Topography <br />Bonestroo, Rosene, Anderlik & Associates Engineers & Architects of St. Paul (Bonestroo) at this <br />time maintains a city-wide 2 foot contour data ba^e for the City. Bonestroo has agreed to <br />share these AutoCAD format two foot contour files with DSU. DSU will use the files to create <br />an ARC/Info format topography coverage for the City. <br />Since the topography data that Bonestroo maintains is in AutoCAD format, there will be <br />significant translation necessary for DSU to create ARC/Info GIS cover.jges from the data. <br />When DSU receives the files from Bonestroo, they will have to be converted to a format that <br />can be read by ARC/Info, read into the GIS, fit together and then attributed. Moving the data <br />to the GIS will take a significant amount of time, as there are approximately 80 Megabytes of <br />data in 97 separate files that have to be translated. DSU has created a set of routines that <br />automate this translation, but a great deal of care must be taken when perfroming the <br />translation to insure that the data maintains both its positional and attribute accuracy. Once it <br />has been translated, the coverage will have a number of mismatched contours at the seams <br />that were created when the city-wide data was broken up to create manageable AutoCAD files. <br />Finally, the coverage will have to be checked to make sure that the contours are positioned <br />correctly and that their elevation values are coded correctly.