Geographic Information Systems (GIS) store, query, analyze, process, and visualize geospatial data. They enable you to link graphical map objects (such as lines on a map) with tabular data (such as the names of roads represented by those lines). You can then perform various visualizations and analyses based on these relationships.
GIS allows you to layer or overlay multiple sources or types of data into a single visualization, whereas in a traditional cartographic document this would not be possible.
It is any data that is spatially referenced to the Earth.
The geospatial data usually contains:
Two common format types of geospatial data are: