Rule, plotting elevation

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OBJECT TYPE
PHOTOGRAMMETRIC PLOTTER
DATE
1968–1970
ARTIFACT NUMBER
2004.1373.002
MANUFACTURER
Wild Heerbrugg
MODEL
1:4000 feet
LOCATION
Switzerland

More Information


General Information

Serial #
N/A
Part Number
2
Total Parts
16
AKA
glass scale
Patents
N/A
General Description
clear glass

Dimensions

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

Length
22.5 cm
Width
2.1 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
presumably c. late 1960s- early 1990s.
Canada
Accessory for Wild A8 plotter 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 establish the plotting scale to be used when mapping.
Technical
Example of precisely ruled glass scale of type used with photogrammetric plotter. Scales are inserted in a holder directly attached to the z column and projected under strong magnification onto a ground glass screen in front of the operator. [Ref.3, p.17] The rule [glass scale] must correspond to the model scale [instrument scale] in order to enable the operator to read the elevations. Wild provided a set of 4 tables, one for each of the 4 different groups of rules [glass scales] available, to facilitate the selection of the appropriate rule and [ratio] gear for a given plotting scale. [Ref. 2, p.32] This scale would have been part of Group II scale set: it is housed with assorted scales from various scale sets.
Area Notes
Unknown

Details

Markings
"1: 4000/ feet" and scale etched into glass. "1" printed by hand in black ink on one short end of rule.
Missing
None: scale is complete in itself.
Finish
Clear glass rule bears black markings.
Decoration
N/A

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

Wild Heerbrugg, Rule, plotting elevation, circa 1968–1970, Artifact no. 2004.1373, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2004.1373.002/

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