In case you're new to it, a Twitter hashtag chat is a fun, easy way to talk with people across the world on an interesting topic. All you do is use the same hashtag in your tweets and follow along in your browser or client of choice. We're going to be using  the tag #cartonama for today's chat.

Henry Addo will be joining us in chat today to talk about the state of crowd sourced tools and projects in the mapping and location data ecosystem. Henry is a software developer living in Accra, Ghana. He has worked as a software developer with several IT companies including Suuch Solutions, txtGhana, IDZ Ghana limited. Currently, Henry works at Ushahidi, a non-profit tech company that specializes in developing free and open source software for information collection, visualization and interactive mapping.

He is passionate about open technologies and has been instrumental in the evangelism and advocacy of the use of Free and Open Source Software in Ghana.