Visualizing Geo Data Jason Sundram, Data Scientist, PayPal - - PowerPoint PPT Presentation

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Visualizing Geo Data Jason Sundram, Data Scientist, PayPal - - PowerPoint PPT Presentation

Mar 09, 2024 283 likes •730 views

Visualizing Geo Data Jason Sundram, Data Scientist, PayPal @jsundram From text: To maps: Who Am I? Math Music Data! Visualization @jsundram runningwithdata.com PayPal Data Science Acquired Where.com, local recommendation

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Visualizing Geo Data

Jason Sundram, Data Scientist, PayPal @jsundram

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From text:

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To maps:

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Who Am I?

@jsundram runningwithdata.com

  • Math
  • Music
  • Data!
  • Visualization
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PayPal Data Science

  • Acquired Where.com, local recommendation & ads
  • PayPal has Petabytes
  • Types of Data
  • We’re hiring!
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What I won’t cover

Perception Map, Gina Chechak

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Three ways of looking

  • Just plot it
  • Spatial aggregation
  • Heat map
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Just Plot It

  • Benefits:
  • Easy
  • Pretty
  • Drawbacks:
  • Reference points?
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Just Plot It

Visualizing Friendships, Paul Butler

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Just Plot It

The UnFacebook World, Ian Wojtowicz

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Just Plot It

Flight Patterns, Aaron Koblin

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Just Plot It

Wispy Routes, Eric Fischer

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Just Plot It

  • Data Without Borders - NYC Data Dive
  • Jake Porway, today at 4pm
  • NY Civil Liberties Union
  • 1,193,763 stops from 2010 alone
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Just Plot It

Stop, Question, Frisk

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Just Plot It - Time

A Week of Check-Ins, Matthew Healy

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Just Plot It

  • Data:
  • Search logs - 6 million searches
  • Facebook profiles
  • Motivation:
  • Showcase demographic & behavioral targeting

Where.com

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  • All-purpose drawing
  • Java
  • Easy to get started
  • Addictive

Processing

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  • Design and edit maps
  • Slippy
  • Easy

Tile Mill

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Unfolding

  • Easily manipulate map tiles in Processing
  • CloudMade, OpenStreetMaps,TileMill

Emography, Daniel Palmer

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Putting it all together

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Three ways of looking

  • 1. Just plot it
  • 2. Spatial aggregation
  • 3. Heat map
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Spatial Aggregation

  • Choropleth = Choro (Area/Region) + Pleth (quantity)
  • Cartogram (Contiguous, Non-Contiguous, Dorling)
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Spatial Aggregation

  • Benefits:
  • Easy to see simple patterns
  • Drawbacks:
  • Perceptual issues
  • Sensitive to color/class choices
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Spatial Aggregation

Uninsured (under 65) from Stats of the Union, Fathom

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Spatial Aggregation

U.S. Agriculture, Bill Rankin

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Spatial Aggregation

United States of Craigslist, John Nelson

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Spatial Aggregation

  • Data:
  • One day of geo-tagged barcode scans
  • Motivation
  • Exploratory

RedLaser.com

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Spatial Aggregation

  • Shapefile - points, polylines, polygons
  • http://www.census.gov/geo/www/tiger/
  • pyshp - python shapefile library

California County Boundaries, geocommons.com

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Spatial Aggregation

Visualizing County Bounding Boxes rtree - spatial index

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Spatial Aggregation

data.json

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Spatial Aggregation

  • d3.js - Data Driven Documents

d3.js, Mike Bostock

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Spatial Aggregation

Poverty: The same data, the same map, different stories, ExcelCharts

emphasis equal intervals quantile average

1 2 3 4

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Spatial Aggregation

view on web Red Laser Scans per Capita

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Three ways of looking

  • 1. Just plot it
  • 2. Spatial aggregation
  • 3. Heat map
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Heat Map

  • Pros:
  • Data decides where you look
  • Better than “Just Plot It”?
  • Cons:
  • Not a lot of insight
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Heat Map

Dencity, Fathom

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Heat Map

Sightsmap, Tanel Tammet

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Heat Map

Participants by Region, OpenPaths.cc

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Heat Map

Search Volume by Language, Google

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Heat Map

  • WebGL Globe
  • Need less than 250,000 points
  • Cheat by binning (e.g. 72.12345 72.1)
  • Scale values
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Heat Map

view on web view on web Red Laser Scans

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Three ways of looking

  • 1. Just plot it
  • 2. Spatial aggregation
  • 3. Heat map
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Thank You

  • Resources:
  • http://viz.runningwithdata.com/vgd/
  • http://bit.ly/strata_vgd
  • @jsundram
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Questions?

@jsundram