This special MapSwipe project involves looking at before and after imagery to check for the development of settlements - it uses low resolution imagery (20 times less sharp than the imagery we typically use on MapSwipe). We are not looking for individual buildings here, in fact it will not be possible to see these, instead we're looking for new clusters of buildings. Millions of individuals living in informal refugee and IDP settlements are estimated to be missing from national surveys, yet they are the world’s most vulnerable populations - displaced and resettled due to disaster, development and/or conflict and violence. The Missing Millions research project in collaboration with Oregon State University and funded by NASA is looking to identify new and expanding informal settlements. The use of low resolution but high-frequency open Sentinel imagery in this project allows for monitoring and identification of settlements quickly on a large scale.