General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

GLASS; PAPER TAPE EDGING. PAPER ENVELOPE

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

30.6 cm

Width

29.1 cm

Height

N/A

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Photogrammetry

Sub-Category

N/A

Manufacturer

AKA

Survey CA

Country

Canada

State/Province

Ontario

City

Ottawa

Context

Country

Canada

State/Province

Ontario

Period

THIS TEMPLATE PROBABLY USED C. 1930S+

Canada

EXAMPLE OF CAMERA-DEPRESSION GRID TEMPLATE USED BY TOPOGRAPHICAL & AIR SURVEY BUREAU OF EMR. BECAUSE OF SIZE & FORMAT THIS TEMPLATE MAY HAVEBEEN USED IN PROJECTOR OR STEREOSCOPIC VIEWER.

Function

SUPERIMPOSED ON PHOTOGRAPHS, MAPS, CHARTS, ETC. TO PROVIDE REFERENCE GUIDE FOR ORIENTATION

Technical

EXAMPLE OF AZIMUTH-DEPRESSION GRID, PRINTED ON GLASS, USED IN PLOTTING DETAIL FROM OBLIQUE PHOTOGRAPHS. THE TEMPLATE PROVIDES REFERENCE TO FOCAL LENGTH, DEPRESSION ANGLE & ELEVATION AT WHICH PHOTOGRAPHS WERE TAKEN ON SPECIFIC SURVEY FLIGHT. PROBABLY USED WITH HIGH OBLIQUE PHOTOS BECAUSE APPARENT HORIZON IS SHOWN. (REF.1)

Area Notes

Unknown

Details

Markings

TEMPLATE MARKED: 'Camera Depression 24o Length of 2F/ True Horizon/ App. Hor. = 5,000/ 10,000/ 15,000/ 20,000', 'PP' [PASS POINT], 'ISO.' [ISOCENTER] AND GRID CO-ORDINATES. 'Topographical Survey, Bureau of Geology & Topography' PRINTED IN LOWER RIGHT CORNER. 'F=5.978' HANDWRITTEN IN BLACK INK ON UPPER RIGHT CORNER. PT ENVELOPE BEARS FOLLOWING HANDWRITTEN TEXT: 'CAMERA DEP. 24o/ Focal Length 5."98'.

Missing

NONE- TEMPLATE IS COMPLETE IN ITSELF

Finish

BLACK MARKINGS ON CLEAR GLASS PLATE. BUFF-COLOURED STORAGE ENVELOPE.

Decoration

N/A