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With this tool, cartographers could measure linear distances on maps by running the tiny wheel along the line between two points. Then they calculated the actual ground distance using the dial reading and the map’s scale.
From "The Encyclopedia of Science and Invention," Volume iI, Champlin Encyclopedias, edited by George Moreby Acklom, Consolidated Book Publishers, 1936, 1946, 1947, 1948.
my route for the weekend !!! Due to the snow we cut out Torino to Slovenia !!
I had to drive for 36hrs continuosly to catch my plane !! MADNESS
www.genekeyes.com/world_map_poster.html
Title:Cahill-Keyes Projection, world political map, Atlantic-centered / designed and calculated by Gene Keyes, 1975, 1980, 2011 ; digital version of graticule and code, to transform GIS data, written by Mary Jo Graça ; political world map compiled & produced by Duncan Webb, 2014.
Primary Author(s):Keyes, Gene, cartographer.
Additional Author(s):Graça, Mary Jo, author.
Webb, Duncan, compiler, producer.
Publication:[Berwick, Nova Scotia, Canada] : Gene Keyes, [2014?]
Description:1 map : color ; 73 x 154 cm
Cartographic:Scale 1:27,000,000 (W 180°--E 180°/N 90°--S 90°).
Language:English
Format:Map
Subjects:Cahill, B. J. S.
Projection--Maps.
World maps.
World maps.
Comparative maps.
Summary:"The Cahill-Keyes projection is a polyhedral compromise map projection first proposed by Gene Keyes in 1975. The projection is a refinement of an earlier 1909 projection by Cahill. The projection was designed to achieve a number of desirable characteristics, namely symmetry of component maps (octants), scalability allowing the map to continue to work well even at high resolution, uniformity of geocells, metric-based joining edges, minimized distortion compared to a globe, and an easily understood orientation to enhance general usability and teachability." --Wikipedia, viewed March 1, 2014.
Notes:Relief and depth shown by gradient tints.
"The essence of Cahill-Keyes is total comparability of map to globe: not only every continent (like Cahill), but also every single 1° and 5° geocell (a Keyes refinement)."
Includes notes, text, and accompanying illustrations on the topics of "Use & Construction," "What is Unique about this Map?," "Gene Keyes" and "B.J.S. Cahill," list of abbreviations, and other notes.
"C-ATL-27M-POL-EN-2014."
this map from 1861 includes interesting details in the section for paterson (top right). also the morris canal.
Part 1 of a copy of a map showing a plan of the Principal Settlements of Upper Canada in 1817. The area covers from Eastern to Midland to Home District.
The original of this map can be found at Library and Archives Canada.
PEC, working with the Fauquier Trails Coalition, has created maps of the trails in each of the County's Service Districts.
A map of India, with each state represented by the flag of a country of roughly equivalent population.
displayed Arms and Armour at The Chhatrapati Shivaji Maharaj Vastu Sangrahalaya, formerly Prince of Wales Museum of Western India (Mumbai museum)
A section of the Ordnance Survey map, showing Redbrae farm at the top, where I was parked, Barallan Hill, over which I had to walk to avoid the cattle, and Mains of Torhouse. The ruins that caught my eye from the top of Barallan Hill are indicated with the red arrow.
Maps of racial and ethnic divisions in US cities, inspired by Bill Rankin's map of Chicago, updated for Census 2010.
Red is White, Blue is Black, Green is Asian, Orange is Hispanic, Yellow is Other, and each dot is 25 residents.
Data from Census 2010. Base map © OpenStreetMap, CC-BY-SA