Portable navigation apparatus for indicating present position on

Details Portable navigation apparatus for indicating present position on Portable navigation apparatus for indicating present position on

1996-03-21

1998-10-06

Nguyen, Tan Q.

Data processing: vehicles, navigation, and relative location

Navigation

701207, 701208, 701212, 701213, 340990, 340995, 342357, G01C 2120, G06F16500

Patent

active

058191992

ABSTRACT:
A navigation apparatus is provided for surveying the position of the apparatus with such surveying unit as a global positioning system (GPS), to have respective figures of reference latitudinal and longitudinal lines X and Y displayed on a display device and, at the same time, to have the latitude and longitude of the position to be indicated by a present position mark of the apparatus calculated in accordance with a preliminarily set scale of reduction of a map utilized. Then, the user places the apparatus on the map so that the latitudinal and longitudinal lines X and Y displayed on the apparatus will coincide with corresponding latitudinal and longitudinal lines on the map, and then the present position can be recognized by the user by means of the present position mark of the display device on the map.

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patent: 5471392 (1995-11-01), Yamashita
patent: 5596500 (1997-01-01), Sprague et al.

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