Often, a practitioner may be wanting to implement a service that they think will be of benefit to the community. The problem facing the practitioner will be where and how to place the service at a particular point in the community, and whether that service is likely to be used. Community mapping is where the practitioner gets people in the community to draw a map of the community of the places that they visit the most and how often they go there. This will give an indication of where to locate a service so that it is conveniently placed and accessible to community participants whom it is intended to service. The problem may arise where there are differences between the places that people visit.