An eco-map (or ecomap) is a graphical representation that shows all of the systems at play in an individual's life. Eco-maps are used in individual and within the social work and nursing profession. They are often a way of portraying Systems Theory in a simplistic way that both the social worker and the client can look at during the session. These ecological maps, or ecomaps, were developed by Hartman in 1975 as a means of depicting the ecological system that encompasses a family or individual. An ecogram is a combination of a genogram and an ecomap. The terms "ecogram" and "ecomap" are often used interchangeably, however.