Plate, cover

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OBJECT TYPE
PHOTOGRAMMETRIC PLOTTER
DATE
1968–1970
ARTIFACT NUMBER
2004.1361.064
MANUFACTURER
Wild Heerbrugg
MODEL
Unknown
LOCATION
Switzerland

More Information


General Information

Serial #
N/A
Part Number
64
Total Parts
65
AKA
N/A
Patents
N/A
General Description
glass; paper

Dimensions

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

Length
25.5 cm
Width
25.5 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
Wild
Country
Switzerland
State/Province
Unknown
City
Unknown

Context

Country
Canada
State/Province
Ontario
Period
plotter used c. 1960s- early 1990s.
Canada
Accessory/part for plotter used in Canada's national mapping program c. 1960s-early 1990s, and is 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. This machine was converted c. 1995-96 to digitize the motions (X,Y & Z) with the addition of encoders and a control pad which interfaced to a computer. The Kern encoders and control module were installed by Terra Surveys of Ottawa when they rented this machine for the MOM project, completing the large scale mapping of Riyadh, Saudi Arabia. The A8 was on loan to Terra for the duration of the project's digital compilation stage. [Ref. 1]
Function
Used with image carrier on photogrammetric plotter.
Technical
Wild A8 plotter introduced in 1952 (with A7 Autograph): these two machines were most widely used plotters in last half of 20th c.. Analogue plotters like A8 are still in use, but are frequently converted to digital operation by addition of digital shift encoders. This permits semi-automation of mapping process from negatives or prints, but is not equivilant to digital technology, which uses images from digital cameras and which is current standard [c. 2000 +] . This plate (and it's mate .065] could not be conclusively identified. It appears to be plain glass, as is used in cover plates for image carriers [see . 5 & .6]; however the markings on the tissue paper wrapper specify the plotter's serial no. and includes "PL No. 531", suggesting this might be a correction plate for use with images produced by a specific aerial camera.
Area Notes
Unknown

Details

Markings
No markings evident on plate. "A8-2465" stamped in black ink on paper wrapper; PL No 531" printed by hand in green pencil on wrapper seal.
Missing
None.
Finish
Clear glass plate wrapped in white tissue paper.
Decoration
N/A

CITE THIS OBJECT

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

Wild Heerbrugg, Plate, cover, circa 1968–1970, Artifact no. 2004.1361, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/2004.1361.064/

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