This repository provides downloadable code for the book, "Data Visualization Toolkit"; see DataVisualizationToolkit.com.

These example programs are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

This is a rails app that runs on Ruby 2.2.3. Clone the repo and run:

• bundle install
• bundle exec rake db:create db:migrate

Then you can follow along with the book.

• Ch 6, "The Chord Diagram"
  • Initial setup (5bf69e6)
  • Import airports and carriers (4d8f846)
  • Import flight departures (uses git-lfs) (abe5a4a)
  • Add foreign keys to departures (44d2064)
  • Chord diagram (d102024)
  • Disjointed city pair chord diagram (60c1d65)
• Ch 7, "Time-Series Aggregates in Postgres"
  • Timeline (a2ff1a9)
  • Fancy timeline (6c57f36)
• Ch 8, "Using a Separate Reporting Database"
  • Create reporting schema (7f14609)
  • Scenic gem and materialized view (d7168b7)
  • Bulk insert into table in reporting schema (364840a)
• Ch 9, "Working with Geospatial Data in Rails"
  • Add PostGIS to departures app (ff68f47)
  • Shapefile import, upsert airports, update lonlat (9a07894)
• Ch 10, "Making Maps with Leaflet and Rails"
  • Map California airports (0ee6ad5)
  • Airport marker clusters (fe86219)
  • Flight path from CEC to BLH (7ec7ef5)
• Ch 11, "Querying Geospatial Data"
  • Find items near a point scope (2523a49)