The purpose of this article is to provide a summary of what is known about teaching ethics in engineering, science, and related disciplines. Such a summary should provide a useful starting point for preparation of a detailed curriculum for teaching the ethics of geo-coded information systems broadly understood ("GIS ethics" for short). It attempts to answer the following questions: What is "ethics" for the purpose of GIS? What is teaching ethics? What objectives should teaching ethics have in a technical curriculum? What methods should be used? How should student work in ethics be assessed? How should the teaching of ethics be assessed?