Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

16

Ou

glass scale

Brevets

S/O

Description générale

clear glass

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

22,5 cm

Largeur

2,1 cm

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Exploration et levé

Catégorie

Photogrammétrie

Sous-catégorie

S/O

Fabricant

Ou

Wild

Pays

Suisse

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

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.

Fonction

To establish the plotting scale to be used when mapping.

Technique

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.

Notes sur la région

Inconnu

Détails

Marques

"1: 3740/ feet" and scale etched into glass. Handwritten markings on one short end of rule are illegible.

Manque

None: scale is complete in itself.

Fini

Clear glass rule bears black markings.

Décoration

S/O