This document discusses the need for exploring ethics and responsible practice regarding location data. It notes that location data technologies are improving and being integrated into many services, creating both opportunities and risks. While location has not been a major focus of data ethics debates, it will come under increased scrutiny. The document proposes developing a "Locus Charter" to establish principles for responsible location data use. It provides context on related initiatives and outlines priorities around privacy, politics, empowering communities, and the environment. The charter aims to provide practical guidance for practitioners to help ensure location data is used ethically.