A geographic information system (GIS) is a digital mapping technique that links computer-generated maps with databases. GIS analysts use this technology to integrate biophysical, ecological, and socio-economic data that can be analyzed for purposes such as tracking wildlife, mapping erosion, monitoring air and water quality, or measuring logging rates. Unlike traditional cartography, GIS data sources are digital and can easily be updated, allowing GIS analysts to produce up-to-date maps using multiple data sets to customize the information for particular industries and audiences.