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Communication and Governance. 1860: Telegraph and Letters 1911: Airmail service 1917: Invisible ink banned / No useful information in letters 1940: Letters and diaries 1990: Email 2004: Freedom Calls 2010: Blogs / Skype. Excellent Data Resource: Worldmapper.
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Communication and Governance • 1860: Telegraph and Letters • 1911: Airmail service • 1917: Invisible ink banned / No useful information in letters • 1940: Letters and diaries • 1990: Email • 2004: Freedom Calls • 2010: Blogs / Skype
Excellent Data Resource: Worldmapper Internet Users 2002 1990
http://www.colorado.edu/IBS/GAD/map.html http://www.colorado.edu/ibs/GAD/ difmov.exe http://www.colorado.edu/IBS/GAD/spacetime.html
Freedom House Map of Freedom 2010 http://www.freedomhouse.org/template.cfm?page=505 http://www.freedomhouse.org/uploads/fiw10/FIW_2010_MOF.pdf
Watersheds of the World–Population Density http://earthtrends.wri.org/text/water-resources/map-278.html
Access to Safe Water • Nearly 1.1 billion people (20% of the world’s population) lack access to safe drinking water. • Kills almost 4,500 children per day. • Worst “water stressed” countries in Sub-Saharan Africa and South Asia. • Climate and geography, lack of water systems and infrastructure, inadequate sanitation, high levels of arsenic and fluoride in drinking water. • Women and young girls trek as much as six miles everyday to retrieve water. • Obstacle to progress and development. http://www.worldwaterday.net/index.cfm?objectid=E38C787B-F1F6-6035-B9D8092D300B7548
http://www.cartoko.com/wiki/images/c/c4/Census_US_1940_Population_Distribution.jpghttp://www.cartoko.com/wiki/images/c/c4/Census_US_1940_Population_Distribution.jpg
Urbanization Urban and Rural Places • Population size and density • Thomas Jefferson’s vision • Characteristics: anonymity, social interactions • Economic functions • Spatial arrangements • Special problems?
Scranton, USGS 1891 http://www.cartoko.com/wiki/index.php?title=Image:PA_scranton_15min_USGS_1891.jpg
Scranton, Pennsylvania http://lcweb2.loc.gov/cgi-bin/query/h?pp/PPALL:@field(NUMBER+@band(det+4a32356))
Scranton, Pennsylvania – Google Earth http://www.maplandia.com/united-states/pennsylvania/lackawanna-county/scranton/
Urban Areas • Environmental determinism: role of physical features – site and situation • Centrifugal forces: impel functions to migrate from central zone beyond it periphery • Centripetal forces: hold certain function in central zone and attract others • Central place theory: size and distribution of settlements dominated by marketing function
Central Place Theory http://content.answers.com/main/content/img/oxford/Oxford_Geography/0198606737.central-place-theory.1.jpg http://commons.wikimedia.org/wiki/File:Christaller's_central_place_theory_animation.gif
Auswanderer-karte und wegweiser nach Nordamerika Immigrant Map and Signpost/Directory to North America
Immigrants as a Percentage of US Population
Centers of Population http://www.census.gov/geo/www/cenpop/MeanCenter.html Mean Population Point Median Center of Population The numerical center of population, is in no sense a center of gravity. In determining the median point, distance is not taken into account and the location of the units of population is considered only in relation to the intersecting median lines - as being north or south of the median parallel and east or west of the median meridian. The center of population is the point at which an imaginary, weightless, rigid, and flat (no elevation effects) surface representation of the 48 conterminous states and the District of Columbia (or 50 states as appropriate to the computation) would balance if weights of identical size were placed on it so that each weight represented the location on one person.
http://en.wikipedia.org/wiki/File:Mean_ctr_pop_US_1790-2000.pnghttp://en.wikipedia.org/wiki/File:Mean_ctr_pop_US_1790-2000.png
Thank you coga@uccs.edu www.uccs.edu/~coga