Head, Clara and Maria Local History
Maria Township ca.1869


Description
Media Type:
Image
Text
Collection
Item Type:
Maps
Description:
A copy of a map of Maria Township issued from the Department of Crown Lands, Toronto.
Notes:
Early surveyors, like William E. Logan, used Rochon micrometer telescopes and targets (disk on a calibrated pole) to measure distance. Each microscope had a different calibration and therefore a different range. The instruments were calibrated against a distance measured with a surveyors chain (also known as Gunter’s chain). One chain had 100 links and was 66 feet (about 20 meters) or 22 yards long.

Sources
William E. Logan (2007). 1845 Survey of the Upper Ottawa Valley. Mercury Series History Paper 54. Charles H. Smith and Ian Dyck (eds.). Gatineau, Quebec: Canadian Museum of Civilization Corporation.

surveyor’s chain. (2010). In Encyclopædia Britannica. Retrieved April 14, 2010, from Encyclopædia Britannica Online: http://www.britannica.com/EBchecked/topic/575448/surveyors-chain
Inscriptions:
Examined and certified a true copy. A. Russell, Assistant Commissioner.
Date of Original:
April 7, 1869
Dimensions:
Width: 10 cm
Height: 20 cm
Map Scale:
40 chains to an inch
Subject(s):
Collection:
Township Collection
Language of Item:
English
Geographic Coverage:
  • Ontario, Canada
    Latitude: 46.16682 Longitude: -78.06623
Creative Commons licence:
by-nc-nd [more details]
Copyright Statement:
Public domain: Copyright has expired according to Canadian law. No restrictions on use.
Copyright Date:
1869
Contact
Head, Clara and Maria Public Library
Email
Maria Township ca.1869
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Maria Township ca.1869


A copy of a map of Maria Township issued from the Department of Crown Lands, Toronto.