Every point in an AutoCAD drawing file can be identified by its X,Y,Z coordinates.
The Gaussian coordinate system is a logical generalisation of the Cartesian co-ordinate system. This is done in such a way, that only one meaning can be attached to the assignment, and that numbers (Gaussian coordinates) which differ by an indefinitely small amount are assigned to adjacent points. They are widely used by Search and Rescue operators and are even becoming more common in guidebooks.
What You Should Know about AutoCAD Coordinate Systems. AMG uses Cartesian coordinates (easting, northings) rather than latitude/ longitude. GPS receivers can display locations in UTM coordinates. The main difference is that projected, geodetic coordinates are Cartesian coordinates with two equally scaled orthogonal axes. If the longitude is given in W as west, the number should be preceded by a minus sign. The State Plane Coordinate System (SPCS), which is only used in the United States, is a plane coordinate system (north-south and east-west lines are perpendicular) in which each individual state has between one to six zones, depending on the state's size and shape. i am accessing same place in google earth and trying selecting option as UTM in google earth but still there is difference in coordinates between the one google earth gives and the one i have in. Coordinate Transformations without changing the geodetic Reference System have extremely high precision ranging within millimeters. BC Environment GIS Working Group has chosen a standard projection and datum for all spatial data stored in ARC/INFO. your map is in UTM (Universal Transverse Mercator) but you have been given GPS points in Lat/Long).
Universal transverse Mercator (UTM) is a geographic coordinate system and the most prevalent plane grid system used. The magnitude of the distortion varies between jurisdictions and can be in the order of decimetres.
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