System and method of longitude and latitude coordinate...

Details System and method of longitude and latitude coordinate... System and method of longitude and latitude coordinate...

G - Physics

01

C

G01C 21/20 (2006.01) B61L 25/02 (2006.01) G01S 5/14 (2006.01)

Patent

CA 2621698

A coordinate transformation system determines the position of a railroad vehicle. The system includes a global positioning system receiver outputting a longitude and a latitude of the vehicle. Each of the longitude and latitude is angular position bounded by a first predetermined longitude and a greater second predetermined longitude or a first predetermined latitude and a greater second predetermined latitude, respectively. A processor includes an input inputting the longitude and the latitude, a routine determining a first distance approximating a distance corresponding to the latitude as a function of the latitude, a third angular position and a first predetermined value, determine a second distance approximating a distance corresponding to the longitude as a function of the longitude, a fourth angular position and a second value, and an output outputting the first and second distances.

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