Template

Use this image

Can I reuse this image without permission? Yes

Object images on the Ingenium Collection’s portal have the following Creative Commons license:

ATTRIBUTE THIS IMAGE

Ingenium, 1996.0189.001
Permalink:

Ingenium is releasing this image under the Creative Commons licensing framework, and encourages downloading and reuse for non-commercial purposes. Please acknowledge Ingenium and cite the artifact number.

DOWNLOAD IMAGE

PURCHASE THIS IMAGE

This image is free for non-commercial use.

For commercial use, please consult our Reproduction Fees and contact us to purchase the image.

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.ingeniumcanada.org/en/id/1996.0189.001/

FEEDBACK

Submit a question or comment about this artifact.