Miriah Meyer University of Utah - SCI @ Utah

cs6630 | October 28 2014

MAPS Miriah Meyer

University of Utah

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administrivia . . .

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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 ! -

show all possible relationships

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venn diagrams ! -

get messy fast

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7

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euler diagrams ! -

show only existing relationships

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euler diagrams ! -

show only existing relationships

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venn & euler diagrams ! -

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 ! -

connect points

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kelp diagrams ! ! ! ! -

cities on a map

!

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metabolic network 21

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 24

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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 25

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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 30

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 38

data as icons 39

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

45 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 48 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 49

Lines of Equal Magnetic Declination first contour map

isopleth map which overlays continuous data using a third encoding channel

Edmond Halley, 1701 50

HEATMAPS

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don’t hide the context

52 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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55 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

58 http://wikimapia.org/3856233/Tinney-Flat-Campground

show time

59 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 60

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

67 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

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flow maps 70

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

72 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 74

area scaled by data

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Kerry vs. Bush, 2004

distortion via diffusion 76

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 86

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 95

L16: Grids

REQUIRED READING

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tbd 97