san diego, california - esri · 2012-08-17 · technical workshops | esri international user...
TRANSCRIPT
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Technical Workshops |
Esri International User Conference San Diego, California
Evaluating the Visual Impact of Maps
Kenneth Field and Damien Demaj
July 25, 2012
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Kenneth Field
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Damien Demaj
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http://resources.arcgis.com/en/communities/mapping/home/ ArcGIS Resources - Mapping
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Outline of session
• Why a checklist approach to evaluation? • Cartographic Requirement • Cartographic design principles - devil is in the detail • Putting the pieces together and publishing online • Synopsis, final checking
C A R T O G R A P H Y
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Why a checklist approach to evaluation?
Map User
GIS User
Map-maker
Cartographer
Knowledge Transfer
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Design is crucial to communication in GIS
Large database
Equal
Treatment
No inherent
design
Data Processing Function Meaning
Design
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Evaluation as part of the design process
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Cartographic Requirement
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Maps are complex graphics
Written/spoken word: SERIAL
Graphics: PARALLEL
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Cartographic requirement
• Audience • Media resolution • Viewing distance • Output medium • Anticipated level of understanding • Conditions of use • One map or multiple maps • What areal extent to show • Insets
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Demo: requirement
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Web maps and basemaps
• What is a web map? • Interactive • Multi scale • Shared via the web • Operational layers and basemap layer
What is a basemap?
• Contextualizes • Support • Changes infrequently
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Cartographic design principles
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Visual hierarchy
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Visual hierarchy
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Demo: visual hierarchy
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Visual contrast
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Figure-ground
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Demo: figure-ground
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Projections
Online map services • WGS 1984 Web Mercator (Auxiliary Sphere)
ArcGIS Online Bing OSM Google
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Demo: projection
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Symbol palette
spacing
size
shape
orientation
hue
lightness
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Symbol meaning
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Demo: symbols
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Classifying data
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Feature generalization
Large scale
Small scale
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Feature generalization
Simplify
Smooth
Aggregate
Amalgamate
Collapse
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Feature generalization
Merge
Refine
Exaggerate
Enhance
Displace
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Demo: feature generalization
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Colour – sequential
Sequential
(Example of “Sequential”)
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Colour – diverging
(Example of “Diverging Critical Class”)
Diverging Critical Class
Diverging Critical Break
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Colour – qualitative
Qualitative
(Example of “Qualitative”)
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Demo: colour
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Typography
Position
Style sans serif
serif
Conflict
CITIES Towns villages
5 point 7 point
10 point 12 point
18 point 24 point
Size Purpose
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Demo: typography
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Putting the pieces together
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Marginalia in web map apps
• Map/app title • Main map • Pop-ups • Dynamic legends • Sliders, clickable icons • Multi-media content • Credit and source
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Demo: layout
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Synopsis
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Please complete an online session evaluation
1. My UC Homepage > “Evaluate Sessions”
2. Choose session from planner or search for session ID for this session: Offering #1 ID: 670
events.esri.com/uc/2012/sessionEvals