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Ingenium, 1996.0190.001
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OBJECT TYPE: AZIMUTH-DEPRESSION GRID/CELLULOID
DATE: 1930–1950
ARTIFACT NUMBER: 1996.0190.001

MANUFACTURER: Topographical & Air Survey Bureau
MODEL: DEPRESSION ANGLE 17 DEGREES
LOCATION: Ottawa, Ontario, Canada

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: CELLULOID; PAPER ENVELOPE (cellulose nitrate)

Dimensions

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

Length: 31.8 cm
Width: 25.3 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 OFAZIMUTH-DEPRESSION GRID TEMPLATE, USED BY TOPOGRAPHICAL & AIR SURVEY BUREAU OF EMR.
Function: SUPERIMPOSED ON PHOTOGRAPHS, MAPS, CHARTS ETC. TO PROVIDE REFERENCE GUIDE FOR ORIENTATION
Technical: EXAMPLE OF AZIMUTH-DEPRESSION GRID, PRINTED ON CELLULOID, 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 LABELLED 'DEPRESSION 17o/ Focal length 8.21 inches/ True Horizon/ Apparent Horizon Elevation 5000 feet', '6000/ 8000/ 10000' [feet] AND GRID CO-ORDINATES. PT ENVELOPE BEARS PRINTED & HANDWRITTEN TEXT: 'Celluloid/ Focal length 8.21 inches/ Depression angle 17o/ Elevation 4000-10000 feet/ Azimuth-Depression Grid/ Topographical and Air Survey Bureau'
Missing: NONE - TEMPLATE IS COMPLETE IN ITSELF
Finish: AMBER-COLOURED CELLULOID. BUFF-COLOURED STORAGE ENVELOPE
Decoration: N/A

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If you choose to share our information about this collection object, please cite:

Topographical & Air Survey Bureau, Template, circa 1930–1950, Artifact no. 1996.0190, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1996.0190.001/

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