Renseignements généraux

Nº de série

S/O

Nº de partie

64

Nombre total de parties

65

Ou

S/O

Brevets

S/O

Description générale

glass; paper

Dimensions

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

Longueur

25,5 cm

Largeur

25,5 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

Switzerland

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

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]

Fonction

Used with image carrier on photogrammetric plotter.

Technique

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.

Notes sur la région

Inconnu

Détails

Marques

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.

Manque

None.

Fini

Clear glass plate wrapped in white tissue paper.

Décoration

S/O