The document discusses various types of flow maps used to represent the movement of goods and people, highlighting flow maps, network flow maps, radial flow maps, distributive flow maps, and point vector flow maps. Each type has distinct characteristics and applications, such as illustrating interconnectivity, distribution, or continuous change over time. References to external sources and examples, including traffic patterns and social media interactions, are provided to further illustrate these concepts.

1. Mapping Flow Data
Aileen Buckley, PhD
Esri - Redlands

2. • Flow maps - show the movement of some phenomenon,
normally goods or people, from one place to another.
Lines are used to symbolize the flow, typically varied in
width to represent differences in the quantity of the flow
Flow Maps
http://blogs.esri.com/esri/arcgis/2011/09/06/creating-radial-flow-maps-with-arcgis/

3. • Network flow maps - show interconnectivity between
places and are usually based on transportation or
communication linkages
• Radial flow maps - have a spoke-like pattern because the
features and places are mapped in nodal form with one
place being a common origin or destination
• Distributive flow maps - show the distribution of
commodities or some other flow that diffuses from one or
only a few origins to multiple destinations
• (Point) vector flow maps – show phenomena that change
continuously and smoothly over space and time using
Euclidean vectors (point locations with magnitude and
direction)
Types of flow maps
http://blogs.esri.com/esri/arcgis/2011/09/06/creating-radial-flow-maps-with-arcgis/

4. Network Flow
Highway Traffic in Oregon
Atlas of Oregon, 2001, page 106

5. Atlas of Oregon, 2001, page 106

6. Radial Flow
Travel by Facebook Users
http://www.forbes.com/sites/jonbruner/2012/06/05/four-facebook-visualizations-that-illustrate-the-
social-networks-reach-and-diversity

7. http://www.forbes.com/sites/jonbruner/2012/06/05/four-facebook-visualizations-that-illustrate-the-
social-networks-reach-and-diversity/

8. Distributive Flow
British Coal Exports - Minard
http://norsemathology.org/longa/tufte/Cartographia.htm

9. Distributive Flow
British Coal Exports - Esri
http://www.arcgis.com/home/item.html?id=3bb350838ee044979d1f583b116cb8c1

10. (Point) Vector Flow
QSCAT High-Resolution Hurricane Analysis
http://www.cora.nwra.com/~morzel/qscat.hurricane.hires.html

11. Animated Displays
Wind Map During Hurricane Sandy
http://hint.fm/wind/

12. Animated Displays
European Airspace Returning to Use After Iceland Volcano Eruption, 2010
http://vimeo.com/11205494

13. Distributive Flow
River Flow - http://demox/demotest/demo.cfm?demo_id=537
http://maps.esri.com/sldemos/flow/default.html