Map projection system

Details Map projection system Map projection system

1989-10-19

1991-06-18

Will, Thomas B.

Optics: image projectors

Target, map or navigation projection

353 12, 353 25, 340995, G08G 1137, G03B 2123, G03B 2128

Patent

active

050245236

ABSTRACT:
In apparatus for displaying map information, at least two maps of the same terrain but of different scale from one another are provided on a movable platform so that a portion of one of the images can be selected and displayed through an optical lens projection system of fixed magnification onto a projection screen and displaying through the optical lens projection system a portion of the selected portion of the one of the map images on the projection screen to examine the display of the other map image in that detail permitted by the scale of the other of the map images at the fixed magnification.

REFERENCES:
patent: 2314497 (1943-03-01), Hargrave et al.
patent: 2548488 (1951-04-01), Mella
patent: 3450472 (1969-06-01), Warden
patent: 3848980 (1974-11-01), Plummer
patent: 4097134 (1978-06-01), Jerie
patent: 4312577 (1982-01-01), Fitzgerald
patent: 4437739 (1984-03-01), Haskin
patent: 4505913 (1985-03-01), Miura et al.
patent: 4675676 (1987-06-01), Takanabe et al.

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