A Geographic Information System (GIS) is a computer-based technology that helps manage, manipulate, analyze and display spatial (mapped) data. A GIS is a powerful tool for map making, planning, management and decision making.

The Global Positioning System (GPS) uses a constellation of satellites to provide locational information. GPS can determine locations of roads, trails, historic structures or any other features found on the landscape. Information collected with a GPS unit can combine with other geographic data using Geographic Information System (GIS) technology.

Online Mapping is a specialized type of GIS mapping using interactive, online maps. A free and easy approach to this type of mapping can be found through a variety of free Google software products (Google Earth, Google Maps, Google SketchUp). Although weak in data analysis, Google tools excel at interactive maps and collaborative mapping.

Check out our handout on general GIS and GPS concepts 2-page PDF