Coordinate System

Acquiring, Converting, and Using DEM Downloads in Civil 3D

by Donnie Gladfelter on March 11, 2009

in Civil 3D 2008,Civil 3D 2009

While importing surface data from Google Earth is probably the easiest way to get some conceptual topographical data into your drawings, DEM’s have to be a close second.  For the uninitiated, DEM’s or Digital Elevation Models could be described as a surface whose data is organized in a grid.  This is fundamentally different than DTM’s [...]

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Converting a Drawings Coordinate System

by Donnie Gladfelter on January 11, 2008

in Map 3D

For one reason or another drawings sometimes need to be moved from one coordinate system (datum) to another.  A classic example may be moving from a NAD 27 datum to a NAD 83.  Whatever the case may be, how might one perform this translation as accurately as possible? To answer that I turn to good [...]

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