This is a pretty cool visualization created using NodeXL – an open source project. sourced from www.connectedaction.net. Top Twitter users who recently tweeted the words geospatial when queried on April 27, 2011, sorted by betweenness centrality. Top most between users:
NodeXL is free and open and available from http://nodexl.codeplex.com/– NodeXL is a free, open-source template for Excel 2007 and 2010 that lets you enter a network edge list, click a button, and see the network graph, all in the Excel window. You can easily customize the graph’s appearance; zoom, scale and pan the graph; dynamically filter vertices and edges; alter the graph’s layout; find clusters of related vertices; and calculate graph metrics.
NodeXL is developed by the Social Media Research Foundation (www.smrfoundation.org) – which is dedicated to open tools, open data, and open scholarship.
Originally uploaded by Marc_Smith