Go Go Gadget, Gephi! The (Mis)Adventures of a Newbie DHer

Elena M. Friot

The week we discussed data visualizations in seminar, some of our classmates took a look at data visualization programs and reported back to us.  What could they be used for? How did they work? What kind of visualization did they produce?

One of my colleagues perused the Gephi program and worked through the tutorial with a sample data set.  Gephi is a “an interactive visualization and exploration platform for all kinds of networks and complex systems, dynamic and hierarchical graphs.”  In the most basic sense, Gephi has the capability to take the data you give it and produce visual representations of the networks, relationships, and hierarchies between “things.”

So, we were shown a visualization of characters from the novel Les Miserables.  She had followed the tutorial included in the program, which produced a snazzy-looking, incredibly complex network of relationships between the characters.  This is a screenshot of the visualization, from…

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Publish your own geocoded web services with CartoDB

Opensas blog


This is the third part of a series of articles that shows how to use several really nice tools to play with open data.

In the first article we saw how to take our comma-separated list of google contacts, and mangle them using OpenRefine.

In the second part we used OpenRefine to access exteral web services like Google Maps and OpenStreetMap to geocode the addresses of our contacts.

Now that we have our dataset ready, we are going to upload it to CartoDB to expose it as a web service.

Introducing CartoDB

cartodb homepage

Even though in this small example we will just use it to expose a rest web service, CartoDB is a full-fledged platform for creating maps and developing applications. Among other features it lets you import your data, style your maps, work with many basemap providers, merge datasets, perform complex spatial queries, visualize your data layers, publish and share…

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