Orthophoto-mapping apparatus

Details Orthophoto-mapping apparatus Orthophoto-mapping apparatus

G - Physics

03

B

95/32.2

G03B 27/68 (2006.01) G01C 11/04 (2006.01) G03B 27/72 (2006.01)

Patent

CA 1155696

ABSTRACT OF THE DISCLOSURE: The invention contemplates effective printing of alphanumerical characters and symbols (for instance control points, sheet corners, terrain coordinates, place and field names, or the like), using optical projection of the characters or symbols onto the film which also receives the orthographic reconstruction of a scanned axial photograph. Specifically, a master stencil of characters and symbols is arranged in the ray path of the optical system used for the orthoprojection, and the stencil is sequentially displaced and exposed while the orthophoto is still in the mapping apparatus. The selection of stencil position is effected under computer control, such that after keyboard input of the desired character, the picture-supporting carriage with the stencil mounted thereon travels from one to its next position, with the projection system effectively shut off. The size and orientation of character exposure can be preselected by element displacement within the orthoprojection system, which contains, inter alia, a zoom system and an image-rotating prism.

380136

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