Introduction to Geographic Information Systems Fall 2013 (INF 385T-28620)

Dr. David ArcturResearch Fellow, Adjunct Faculty

University of Texas at Austin

Lecture 3September 12, 2013

GIS Outputs

Outline Map audiences Map layouts Reports and graphs Map scales Interactive map Map animation ArcGIS Online Exporting maps

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Two categories of audience General public

Purpose: communication or information lookup

Frequency of use: low and irregular Geographic knowledge: general

Trained analyst Purpose: exploration—identification and

diagnosis of spatial patterns (problems) Frequency of use: high and regular Geographic knowledge: special

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Map audiencesMap use: Exploration

PresentationAudience: Trained analyst General publicPurpose: Visual thinking

Communication

Advantages: Graphical BelievableGranularity: Fine Coarse

Symbols: Abstract Mimetic

capital

railroad4INF385T(28620) – Fall 2013 – Lecture 3

MAP LAYOUTSLecture 3

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Layout example 1

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•Map—most prominent element

•Map title and subtitle

-what, where, and when

•Legend- no need to label it Legend

•Data sources•Date

- date data collected

•Map author (optional)INF385T(28620) – Fall 2013 – Lecture 3

Layout example 2

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Graphic scale-on large-scale maps

North arrow-not always necessary

Neatline-rectangular boundary

Other elements -Data sources -Inset maps -Data tables -Charts -Photographs

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Layout example 3Multiple maps

Same: Sizes,

positions Scales (map

and numeric) Projection Color ramps

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Bad layout

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Good layout

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REPORTS AND GRAPHSLecture 3

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Create a report Select records for a report

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Add report to layout

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Create a graph

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Create a graph

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MAP SCALESLecture 3

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Map scales

Map scale ratios Dimensionless Used with any linear measurement

unit such as feet, meters, or miles Example, 1:24,000

“Representative fraction” 1 inch on the map is 24,000 inches on the ground

(or 2,000 feet)

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Map scales

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1:10,000 is large scale

1:100,000,000 is small scale

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Scale 1:100,000

Scale

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Scale 1:24,000

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Scale 1:10,000

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Map units

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Feet or meters isthe map unit formost local

government GIS applications

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Commonly used map scales

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INTERACTIVE MAPLecture 3

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Example: Decision support for police

Detection—scan entire jurisdiction for problems/opportunities Where are there large numbers of burglaries? Large

increases in burglaries expected?

Diagnosis—drill down to details for problem solving Analyze patterns of leading indicator crimes that

are predictive of future burglaries

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General elements of decision support system Keep event-data layers (usually product or

service demand) up to date

Provide enterprise-level choropleth maps for product/service demand level and change for detection and forecasting

Provide large-scale map layers with individual demand points for diagnosis Uses visible scale range to turn detailed layers on

when zoomed in

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Detection: High burglary levels

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Detection: Large changes in burglaries

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Diagnosis: drill down to current burglary and leading indicator crimes

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MAP ANIMATIONLecture 3

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Create animation Crimes over time

Set time properties

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Animation properties Time slider window and options

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Play animation

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CAD Calls Context shows recent historical crime points CAD Calls shows current crime points Combination of two layers shows emerging, persisting, and

extinguishing spatial crime clusters

ARCGIS ONLINE

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Lecture 3

ArcServer software for online maps

Organization must have own server and computer programmers

Expensive to install and maintain See demos at

http://www.esri.com/apps/showcase/index.cfm?fa=showcase&StartRow=126&Tech=ArcGIS

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ArcGIS Online Web service hosted by Esri on Esri servers

www.arcgis.com Versions

Free for individuals using standard interface Subscription web service for organizations

Allows customization of “look” and structure Can embed into organization website

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Sample ArcGIS Online individual map

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Viewed in browser over the Internet Uses Schools and Neighborhoods created in ArcGIS for Desktop Uses basemap with topography and roads from ArcGIS Online

EXPORTING MAPSLecture 3

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Outputs Raster

.bmp, .tif, .jpg Size/Resolution Color options

Vector Enhanced Metafile (.emf) Encapsulated PostScript (.eps) Adobe Illustrator (.ai) Layer packages (.lpk) .dxf or .dwg

Web .JPG, .PDF

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Export map Data or layout view

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Image file

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PDF document

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Word or PowerPoint Copy and paste individual map

elements

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Summary Map audiences Map layouts Reports and graphs Map scales Interactive map Map animation ArcGIS Online Exporting maps

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Assignment 3-2: First Draft…

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3-2: Refined…

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