In this activity, developed by the Lane Community College Geo-STAC program​, students "understand geographic location (absolute and relative) using an interactive Web-based GIS map." The lesson helps review basic concepts of coordinate geometry as they move about the world identifying coordinate relationships and important reference lines. On the site, visitors will find a link to the student activity and teaching guide, as well as link to the web-based GIS map. This is an excellent activity for high school or early undergraduate students for hands-on work with GIS and coordinate systems.