At 22:31 -0500 02/12/4, Bruce Hebbard wrote:
Fascinating!The coordinates cited below are almost certainly ECEF or "Earth Centered, Earth Fixed", as described by Peter H. Dana (which is about all I know about this :)... [begin quote] * Earth centered, earth-fixed, X, Y, and Z, Cartesian coordinates (XYZ) define three dimensional positions with respect to the center of mass of the reference ellipsoid. * The Z-axis points toward the North Pole. * The X-axis is defined by the intersection of the plane defined by the prime meridian and the equatorial plane. * The Y-axis completes a right handed orthogonal system by a plane 90 degrees east of the X-axis and its intersection with the equator. [end quote; from... http://www.colorado.edu/geography/gcraft/notes/coordsys/coordsys_f.html <Peter H. Dana, The Geographer's Craft Project, Department of Geography, The University of Colorado at Boulder> see Coordinate Systems / Global Systems / ECEF X, Y, Z for links to a couple of handy diagrams]The US National Geodetic Survey has a little interactive converter at http://www.ngs.noaa.gov/TOOLS/XYZ/xyz.html; plugging in the XYZ values you gave (in *meters*, he said, desperately trying to keep this on topic :-), it spits out...
And it also works the other way around : from now on my postal address will be:
X = 4269556.7194
Y = - 48024.6218
Z = 4722335.2744
(please note that the Z coordinate above refers to my favorite position, i.e. lying in my bed...)
Louis
