General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

correction plate picture carrier

Patents

N/A

General Description

metal & glass

Dimensions

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

Length

33.0 cm

Width

30.4 cm

Height

2.5 cm

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

Wild

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

presumably used c. 1960s- early 1990s.

Canada

Optional accessory for A8 plotter used in Canada's national mapping program c. late 1960s-early 1990s, and an example of the last analogue plotting devices used by the Topographic Service of Canada. With the exception of the Wild A10 [few of which were used in Canada], this machine was the most sophisticated plotter available before digital technology.

Function

To correct for distortion of the aerial camera lens which produced the image.

Technical

One of 2 correction plate picture carriers [presumably] used with plotter. Identical to picture carriers for A8 and A7 Universal Autograph, facilitating movement of mounted images directly from one machine to the other: as the two plotter models were often used within the same facility, this greatly facilitated operations and was an attractive feature. [Ref. 4, p. 50] The glass correction plates were ground to specification for the correction of the taking lens [of the aerial camera] or the mean distortion curve of a specific lens type: in this case, for the Aviogon 39. Pairs of plates were available as optional extra-cost eq. from Wild. The cross level (2004.1361.9) could be fitted to the holes in the frame. [Ref. 3]

Area Notes

Unknown

Details

Markings

"Wild Aviogon f=6" Pl No 39" printed in black on upper right edge of glass. "AVIOGON/ No39" crudely incised in lower left of frame.

Missing

Appears complete.

Finish

Metal frame has grey enamel painted finish: corners have brass-colour metal inserts on reverse; single glass pane secured within frame; metal clips.

Decoration

N/A