what is a gis?
GIS (geographic information system) A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earthâs surface. A geographic information system (GIS) is a computer system for capturing, storing, checking, and displaying data related to positions on Earthâs surface. By relating seemingly unrelated data, GIS can help individuals and organizations better understand spatial patterns and relationships.