Today I took some time to update my list of HOT mapping initiatives – a bit of a messy process because there’s no official listing. These days I simply review new projects in the OSM edit history that have a minimum number of contributors, and label them with a simple term. The intention is to identify groups of projects that have a common theme. Typically these are disaster events, larger mapping campaigns like Missing Maps, or organisations that organise projects for their members. Of course the boundaries between them are blurry, e.g. Missing Maps is really a meta-initiative across many discrete projects.

Here’s a timeline of the initiatives I’ve identified so far – let me know if I missed any! There’s also a PDF version, in case you want to include this in presentation slides.