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Projection Type Topographic Geological Thematic Presentations Navigation <br /> Maps Maps Maps <br /> Conic <br /> Lambert Conformal Conic Yes Yes Yes Yes <br /> Conic <br /> Equidistant Conic Conic <br /> Polyonic Conic Yes <br /> Biplolar Oblique Conic Yes <br /> Conic Conformal <br /> *Matrices courtesy of U.S. Geological Survey <br /> Coordinate Conversion <br /> A GIS layer ' s spatial information is stored in a coordinate system , defined by the projection of <br /> the map . The coordinate system of the digital map is important . If digital data are obtained <br /> without a specified coordinate system , it may not be readily possible to determine the <br /> projection . <br /> Various map projection and coordinate conversion tools are available in the ESRI product <br /> suite, as well as other commercial and governmental applications ( Blue Marble, Corpscon , <br /> etc . ) . Most of the routine coordinate conversions can be performed in ESRI software, yet the <br /> following software is also available forother custom and batch coordinate processing as well <br /> as for conversion of other data formats that may be useful . <br /> Blue Marble Geographics <br /> http : //www. bluemarblegeo . com / <br /> — The Geographic Calculator converts individual coordinates, <br /> point databases, and map files from virtually any coordinate <br /> *�► system , datum , and map projection to any other. Users can <br /> l - transform between coordinate systems , calculate the <br /> distance and azimuth between coordinates, and calculate <br /> coordinates at a known distance and azimuth from known <br /> moi] coordinates . The Geographic Calculator also computes grid <br /> convergence , point scale factor, datum shifts, and grid shifts . <br /> The Geographic Calculator is professionally documented and <br /> supported . <br /> 6-8 <br /> GIS Needs Assessment and Implementation Plan Chapter 6 - Data Standards and Transfer <br />