The StellarMate Plus Manual
182 / 341
The normal geographic coordinate system assumes that the Earth is a perfect
sphere. This is nearly true, so for most purposes geographic coordinates are fine.
If very high precision is required, then we must take the true shape of the Earth
into account. The Earth is an ellipsoid; the distance around the equator is about
0.3% longer than a Great Circle that passes through the poles. The Geodetic
Coordinate system takes this ellipsoidal shape into account, and expresses the
position on the Earth's surface in Cartesian coordinates (X, Y and Z) or in
Geographic coordinates (Longitude, Latitude and Elevation).
To use the module, first select which coordinates you will use as input in
the Select Input Coordinates section: “Cartesian” or “Geographic”. Then select an
ellipsoid model and fill in the input coordinates in either the Cartesian
Coordinates section or the Geographic Coordinates section. When you press
the Convert button, the corresponding coordinates will be filled in.
The module contains a batch mode for converting several coordinate values at
once. You must construct an input file in which each line contains up to three
numbers: the input coordinate values (either Cartesian or Geographic). Then
specify which coordinates you are using as input, and identify the input and
output filenames. Finally, press the Run button to generate the output file, which
will contain the converted coordinates (Cartesian or Geographic; the complement
of what you chose as the input values).
Planet Coordinates module
To Next Page
Loading...
