Dots on a Map

Deploying an interactive point map:

a technical presentation.

Branden DuPont

Data Analyst

Medical College of Wisconsin

Institute for Health and Equity

PA Class of 2015

Who I am. What I Do.

• Data Analyst
• Law Clerk
• Expertise: analytics in criminal/civil justice with a spatial emphasis
• Relevant expertise for presentation: Data Viz
  • "Data visualization is broadly defined as a method of encoding quantitative, relational, or spatial information into images." - Jack Dougherty

Overview of First  Presentation

• Map your Data (in Tableau)
  • Basic spatial data types (point, polygon, line)
  • Advance examples
• Zip Codes are Polygons
  • What are zip codes
  • Census data
• Here be dragons
  • MOE
  • MAUP
  • Choosing a tool
  • Spreadsheet Considerations

Create a Point Map

• Tidy data basics
• Geocoding basics
• Geocode Prep
• Using a batch geocoder: Geocodio
• Dots on a Map
• Basemap from Mapbox
• Design and Cartography Notes
• Publish Map

Resources/Citations

• https://www.datavizforall.org/introduction/what.html
• https://www.gislounge.com/geodatabases-explored-vector-and-raster-data/
• https://www.gislounge.com/gis-dictionary/
• Bullet Three

Spatial Data Types

(vector)

• Polygon - used to represent areas that have a boundary e.g. zip code, city boundary, park
• Point - discrete point. Can be represented by latitude and longitude pair e.g. restaurant, residential home, incident of crime
• Line - linear feature e.g. river, street,
• Combination of the above
• Vector vs raster

Polygon Map Example

Point Map Example

Line Map Example (MCTS)

Advance Examples

Searchable Lead Service Line Map

MHCP Safety Net Clinic Directory

Basic Example - Resident Contacts

Zip Codes are Polygons

• Bullet One
• Bullet Two
• Bullet Three

Margin of Error (MOE)

Seth Spielman - Assistant Professor of Geography, University of Colorado

Modifiable Areal Unit Problem (MAUP)- add gerrymader chart

MAUP Example

Choose a Tool

• Bullet One
• Bullet Two
• Bullet Three

Spreadsheet Considerations

• Bullet One
• Bullet Two
• Bullet Three