The document summarizes a DataVisualization Group meetup in April 2011. It describes a demo of a tool that visually maps a user's LinkedIn network, using big data processing on over 100 million unique networks. The tool was created using a combination of Hadoop, force-directed graph layouts, data storage in Voldemort, and a front-end built with Ruby, Java, LinkedIn APIs, SVG, Canvas, images, and interactivity layers using Seadragon and RaphaelJS for zooming and panning on large networks with over 10,000 connections. Considerations in the map design included layout, distances, curved edges, density, text readability, font size, outlines, and overlap avoidance