QGIS is a free and open-source cross-platform desktop geographic information system (GIS) application that allows one to analyse, edit, construct and export geospatial data. Michael Pulsford has created and shared a document to help one get started using GIS.
This article outlines a model for thinking about the different levels of engagement of people involved in a campaign; what kinds of things people at each level can do, and what support they need to do those things; and how people can move from one level to another, aka a ‘ladder of engagement’. It also has implications for how we think about events and capacity, and for how well a campaign can scale.