Miriah Meyer University of Utah

cs6630 | October 28 2014
MAPS
Miriah Meyer
University of Utah
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administrivia . . .
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!
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parallel coordinates assignment due Thursday
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last time . . .
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Text
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Text
?
what does it mean to be an “item”?
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single document
Tag Clouds / Word Clouds
http://www.tagcrowd.com
http://www.wordle.com
collection of documents
Showing Temporal Relationships:
ThemeRiver (Stream Graph)
Havre, Hetzler, Nowell 2000
SETS
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venn diagrams
!
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show all possible relationships
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venn diagrams
!
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get messy fast
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7
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euler diagrams
!
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show only existing relationships
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euler diagrams
!
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show only existing relationships
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venn & euler diagrams
!
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adjust for area
!
!
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starts getting tricky!
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compact euler diagrams
!
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visualizing sets with constraints
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bubble sets
!
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connect
points
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kelp diagrams
!
!
!
!
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cities on a map
!
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metabolic network
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today . . .
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MAPS
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
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flow maps
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
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flow maps
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landmarks
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RECOMMENDED READING
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-
straighten wiggly lines
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snap turns to right angles
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expand regions with turns
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contract long straight roads
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label carefully
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maintain overall orientation
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Agrawala 2001
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bing’s destination maps
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bing’s destination maps
bing’s destination maps
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
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flow maps
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data
as
icons
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what do they mean?
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http://oakland.crimespotting.org/
data as
points
data : ordered/
quantitative
!
encoding : size
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traffic
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data as
points
data : categorical
encoding : hue
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data : categorical
encoding : hue
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http://www.flickr.com/photos/shazbot/3282821808/in/set-72157614736071588/
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data as lines
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http://fathom.info/allstreets/
data as
charts
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http://alaska.usgs.gov/science/biology/seabirds_foragefish/foragefish/Aleutian/results.php
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
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flow maps
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Lines of Equal Magnetic Declination
first contour map
isopleth
map which overlays
continuous data using a
third encoding channel
Edmond Halley, 1701
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HEATMAPS
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don’t hide
the context
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http://es.deister.net/es/solutions/ax-mobile/ax-mobile-components-maps/
choose the
appropriate colormap
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bin the data
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http://www.nola.com/hurricane/index.ssf/2011/08/hurricane_irene_lashes_the_tur.html
ISOCURVES
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Wind Map
first weather map
Edmond Halley, 1686
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show topology
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http://wikimapia.org/3856233/Tinney-Flat-Campground
show time
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http://www.nytimes.com/interactive/2011/03/11/world/asia/maps-of-earthquake-and-tsunami-damage-in-japan.html
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
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flow maps
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Illiteracy in France
first choropleth map
choropleth
map in which areas are
shaded, colored, or
patterned relative to a
data attribute value
Charles Dupin, 1826
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Kerry vs Bush, 2004
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Matthew Ericson, NY Times
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Matthew Ericson, NY Times
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Matthew Ericson, NY Times
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Matthew Ericson, NY Times
in 3D!
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Matthew Ericson, NY Times
UFO hotspots
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http://www.ufoera.com/images/ufo/ufo-hotspots-map_117.png
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http://popvssoda.com/
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
-
flow maps
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Land Area
first cartogram
cartogram
map in which areas are
scaled and distorted
relative to a data
attribute value
Emile Levasseur, 1868
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rectangular cartogram
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http://www.nytimes.com/ref/washington/2006ELECTIONGUIDE.html
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Population
first nonrectangular cartogram
Population and Federal Taxes
first modern cartogram
William Bailey, 1910
Joseph Grundy, 1929
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area scaled by data
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Kerry vs. Bush, 2004
distortion via diffusion
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Matthew Ericson, NY Times
RECOMMENDED READING
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the world
78http://www-personal.umich.edu/~mejn/cartograms/
population
79http://www-personal.umich.edu/~mejn/cartograms/
GDP
80http://www-personal.umich.edu/~mejn/cartograms/
child mortality
81http://www-personal.umich.edu/~mejn/cartograms/
people living with HIV/AIDS
82http://www-personal.umich.edu/~mejn/cartograms/
total spending on healthcare
83http://www-personal.umich.edu/~mejn/cartograms/
Harry Beck’s Tube Map
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do they work?
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landmarks
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discrete data
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continuous data
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choropleths
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cartograms
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projections
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flow maps
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FLATTENING THE GLOBE
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latitude, longitude
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a sphere tears
when you flatten it
http://www.oocities.org/suzy_gillece/
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many ways to tear...
myiahedral projection
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van Wijk 2008
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http://xkcd.com/977/
CLASSES OF PROJECTION
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azimuthal
preserves direction
equal-area
preserves area
conformal
preserves local shapes
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L16: Grids
REQUIRED READING
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tbd
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