Welcome to our 4th annual humanitarian mapathon with USC and UCLA. This year we have expanded our mapathon to a 3 day event. We will kick things off on Wednesday, October 28th with a special welcome and training. Mappers will then have till Thursday night at midnight to be a part of the mapathon. In addition to contributing to humanitarian projects around the world participants are welcome to join us for a series of workshops on Thursday October 29th. Finally, we will bring the event to a close with a special keynote speaker, Ben Welsh from the Los Angeles Times, on Friday at 10am. And, of course, we will share the results of our humanitarian mapathon, including top mappers as well as our total contribution.