Intro to Web Mapping and Geodata with CartoDB

Chad Nelson
Temple University Library
@bibliotechy

Scott Williams
Yale Art Gallery
@moltude

These slides @ bibliotechy.github.io/cartodb

Prerequisites

  • CartoDB
  • Open Data Philly

http://bit.ly/1jxrVWm

Michigan centroid

Point map demo

Types of Geodata

Vector

Raster

Vector: Points

Google map showing many libraries in philadelphia

Coordinates (Lat, Long)

Vector: Polygons

Outlines of Philadelphia

Fixed Boundaries - City / State / Country

Polygons

Map of Philadelphia Crime hot spots

Dynamic Areas

Raster

Google Maps

Raster

Historic map of Philly, showing detail around Chemical Heritage Foundation

Historic Maps

Data Formats

  • Geojson
  • KML / KMZ
  • CSV
  • Shapefile™
  • Georeferenced Images

OpenDataPhilly lists more than 20 formats, so...

But Why?

  • To show things on a map?
  • Convey complex information
  • Learn new things about our data
  • Tell a story

How to tell that story?

Wind map of United States when Hurricane Sandy made landfall

Extract from Wind Map of Hurricane Sandy making landfall

Choropleth

Map showing distribution of hazardous waste across the United States

Time based Maps

Intensity

Every meteorite fall on earth mapped

Join

How do these datasets intersect

Books in the Library

Selction from spreadsheet listing informatino about books in a library

Books on Reading Lists

Selction from spreadsheet listing informatino about books in a library

What do they have in common?

ISBN

Books In the Library On Reading Lists

Selction from spreadsheet listing informatino about books in a library