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Cartographic Intactness and the Three Mile to One Inch Sectional Maps of Western Canada

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Larry Laliberte

on 26 April 2017

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Transcript of Cartographic Intactness and the Three Mile to One Inch Sectional Maps of Western Canada

Historical Feature Filter
1911 CSDs
1921 CSDs
Weighted Areal Interpolation
Utilizing Line Work as Linear Density
A Method to Compare Population Change at the Same Level of Geography Over time
% of Township Land Area within CSD * Linear Density Weight
Alberta - McKay - Sheet 566
First Edition, 1st July 1914
Vectorization
Edmonton 1992
Calculate Linear Density
thematic maps - cartes thématiques
consistency -- cohérence
a curators deep knowledge of the print collection
Oil Sands Foot Print 2011
Overlay
Intersect
Dissolve (sum)
Join
scanned maps -- cartes numérisées
discernibility -- clarity -- lucidity
1914
2014
1915
2013
1915 - 2012 Edmonton Sprawl
St. Albert
discernabilité - clarté - lucidité
connaissance approfondie d'un conservateur des documents imprimés
(scale and time) (échelle et de temps)
Cartographic Intactness
& the Three Mile to One Inch Sectional Maps of Western Canada
Larry Laliberté
University of Alberta
June 18th, 2014
Old Style
New Style
Published 134 Sheets and 702 editions
53 year history of recording the surveying and settlement of the Canadian Prairies
Limestone River Sheet 524. First Edition, September, 1915.
Virden Sheet 71. Tenth Edition, March, 1923.
Alberta - McKay - Sheet 566
Cartographic Intactness
Historical Map Noise
Linear Density/Orientation
Scanning
Georeferencing
Clipping
Mosaicing
Vectorization
ArcScan
https://gist.github.com/brian2073/9233576
https://github.com/NYPL/map-vectorizer
This project aims to automate the manual process of geographic polygon and attribute data extraction from maps
OCR for Maps
construct (then teach) algorithms to read symbols
oblique lettering and colour fills
Petropolis: Aerial Perspectives of the Alberta Tar Sands (2009)
Aggregate Line Work
(Alberta Townships)
Alberta Township System
GIS Ready Vector Files (Still Controlled in Alberta by AltaLIS)
410068
File_Name
Descriptor
TWP-068 RGE-10 MER-4
Alberta Historical Trails
Length (m) by Township
The Alberta Land Settlement Infrastructure Project
Each record contains 32 pieces of information

name, gender, age, marital status, birthplace, citizenship, number of children, occupation, last address, nature of living place, other employment, reasons for leaving, condition of buildings, value of improvements, number and type of animals, acres broken and cultivated
A Deep Map of layered locations and tethered relations
Sebert, L. The Three Mile to One Inch Sectional Maps of The Canadian Prairies. ACMLA Bulletin #75, 1990.
place
hysical
ocation
motional
space
attern
Trails digitized from Township Maps by Alberta Heritage
Eclipsed by the Board of Topographic Surveys and Maps
1914 - 1921
The Holy Grail of Map Digitization
Alberta 1911 CSDs
the land’s geographical co-ordinates (T/R/QS)
construire (puis enseignants) des algorithmes de lire des symboles de lettrage et de couleurs remplissages obliques
1914 - 1921
Lines
Hotspot
http://bit.ly/SSZYdn
Geospatial Data Services Librarian
Full transcript