Portable navigation apparatus for indicating present position on a map with indicated reference latitudinal and longitudinal lines based on surveyed present position data
First Claim
1. A portable navigation apparatus for use in combination with a generally available map that includes latitudinal and longitudinal lines and a scale of reduction, comprising:
- means for surveying the latitude and longitude of a present position;
means for inputting and setting in the portable navigation apparatus the scale of reduction of the map used;
a display device including a permeable type display means having a present position mark and including means for displaying on the permeable type display means at least portions of the closest latitudinal and longitudinal lines with respect to the present position mark; and
a control device including means for obtaining reference latitudinal and longitudinal values corresponding to the latitudinal and longitudinal lines described on the map to be the closest to the present position on the map and corresponding to the surveyed present position, and including means for displaying positions of the closest latitudinal and longitudinal lines on the permeable type display means in accordance with the reference latitudinal and longitudinal values obtained and with the set scale of reduction of the map,the portable navigation apparatus being placed on the map to bring the respective displayed positions of the latitudinal and longitudinal lines on the display device to coincide with the corresponding closest latitudinal and longitudinal lines on the map, and to point out the present position on the map with the present position mark of the permeable type display means.
1 Assignment
0 Petitions
Accused Products
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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Citations
14 Claims
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1. A portable navigation apparatus for use in combination with a generally available map that includes latitudinal and longitudinal lines and a scale of reduction, comprising:
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means for surveying the latitude and longitude of a present position; means for inputting and setting in the portable navigation apparatus the scale of reduction of the map used; a display device including a permeable type display means having a present position mark and including means for displaying on the permeable type display means at least portions of the closest latitudinal and longitudinal lines with respect to the present position mark; and a control device including means for obtaining reference latitudinal and longitudinal values corresponding to the latitudinal and longitudinal lines described on the map to be the closest to the present position on the map and corresponding to the surveyed present position, and including means for displaying positions of the closest latitudinal and longitudinal lines on the permeable type display means in accordance with the reference latitudinal and longitudinal values obtained and with the set scale of reduction of the map, the portable navigation apparatus being placed on the map to bring the respective displayed positions of the latitudinal and longitudinal lines on the display device to coincide with the corresponding closest latitudinal and longitudinal lines on the map, and to point out the present position on the map with the present position mark of the permeable type display means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A portable navigation apparatus for use in combination with any generally available map such as is commonly used for example by hikers, motorists or bicyclists that includes latitudinal and longitudinal lines and a scale of reduction, comprising:
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apparatus for setting in the portable navigation apparatus the scale of reduction of the map; apparatus for surveying the latitude and longitude of a present position; a frame having a window through which the map may be viewed when the frame is placed on the map; a display device mounted to the frame, the display device including; a transparent plate mounted in the window, the transparent plate including a present position mark; apparatus for indicating reference latitudinal and longitudinal lines of the map that are closest to the present position; and apparatus for displaying latitudinal and longitudinal lines corresponding to the present position; and a control device including; apparatus for determining latitudinal and longitudinal values corresponding to the present position; apparatus for determining reference latitudinal and longitudinal values corresponding to the latitudinal and longitudinal lines on the map that are the closest to the present position; and apparatus for controlling the display apparatus to display the latitudinal and longitudinal values corresponding to the present position and to display the reference latitudinal and longitudinal lines closest to the present position in accordance with the latitudinal and longitudinal values obtained for the present position and with the set scale of reduction of the map; the frame being placed on the map to bring the respective displayed positions of the latitudinal and longitudinal lines on the display device to coincide with the corresponding latitudinal and longitudinal lines on the map, and to point out the present position on the map with the present position mark.
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Specification