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Ingenium,
1996.0189.001
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- OBJECT TYPE
- AZIMUTH-DEPRESSION GRID/GLASS
- DATE
- 1930–1950
- ARTIFACT NUMBER
- 1996.0189.001
- MANUFACTURER
- Topographical & Air Survey Bureau
- MODEL
- DEPRESSION ANGLE 23 DEGREES-30 MINUTES
- 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
- 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
- 31.5 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 OF AZIMUTH-DEPRESSION GRID TEMPLATE USED BY TOPOGRAPHICAL & AIR SURVEY BUREAU OF EMR. BECAUSE OF SIZE & FORMAT THIS TEMPLATE MAYHAVE BEEN 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, DEPRESSIOON 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: 'True Horizon/ DEPRESSION 23o-30'/ Apparent Horizon Elevation 5000 feet', '6000/ 8000/ 10000' [feet]; 'Focal length 8.21 inches' AND GRID CO-ORDINATES. PT ENVELOPE BEARS PRINTED & HANDWRITTEN TEXT: 'Focal length 8.21 inches/ Depression angle 23o-30'/ Elevation 4000-10000 feet/ Azimuth-Depression Grid/ Topographical and Air Survey Bureau'
- Missing
- NONE - TEMPLATE IS COMPLETE IN ITSELF
- Finish
- BLACK MARKINGS ON CLEAR GLASS PLATE. BUFF-COLOURED STORAGE ENVELOPE
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Topographical & Air Survey Bureau, Template, circa 1930–1950, Artifact no. 1996.0189, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingenium.ca/en/id/1996.0189.001/
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