What Is GIS and What Can Geographic Information System Technology Be Used For?

Updated

GIS (geographic information system) is technology that links data to locations on the earth and then maps and analyzes those relationships. Esri, the company behind ArcGIS, describes GIS as a way to "integrate and connect data through the context of geography." You can use it to visualize where things are, measure spatial patterns, and support location-based decisions. It fits work where location changes the answer — routing, site selection, asset tracking, service coverage — and is less useful when location plays no role in the problem.

What GIS actually does

GIS combines three things: location data (addresses, coordinates, boundaries, routes), attribute data (what is at each location), and analysis tools that compare them. The output is typically a map, but the map is the interface, not the product. The product is a decision: which route is shortest, which site reaches the most customers, where coverage gaps exist.

Esri frames its platform, ArcGIS, as "enterprise technology that integrates and connects data through the context of geography" — meaning GIS is usually layered onto existing operational data rather than replacing it.

Common uses by field

The Esri site gives concrete examples of organizations applying GIS:

Field Example from Esri What GIS is doing
Logistics UPS Optimizing driver routes, adding about 500,000 stops a day, cutting roughly $350 million in annual costs
Business operations Sweeping Corporation of America Integrating operational location data across the enterprise to find savings and growth
Natural resources / agriculture Texas A&M Giving ranchers data-driven tools to strengthen supply chain efficiency
Energy US Solar Doubling the properties evaluated without adding head count
Retail Esri podcast episode Transforming retail outcomes with geospatial software
Government Oklahoma Automating election data maintenance to improve accuracy

These span route optimization, asset and operations management, market evaluation, and data maintenance — a useful signal of where GIS pays off.

How to judge whether GIS fits your work

Ask these questions before investing:

  • Does location change the decision? If two options differ mainly by where they are (routes, sites, service areas), GIS adds value. If location is incidental, it probably doesn't.
  • Do you already hold location data? Addresses, GPS traces, boundaries, and asset registers are the raw material. GIS connects and analyzes them; it doesn't create them.
  • Is the question spatial? "Where are the gaps?" "Which route is shortest?" "Which site serves the most people?" are GIS questions. "What were sales last quarter?" is not, unless you add a where.
  • Do you need repeatable, shared analysis? Enterprise GIS is built for ongoing operations and long-term strategy, per Esri — a better fit than one-off mapmaking.

Where to start

Esri positions ArcGIS Online as a starting point: "ready-to-use mapping, analysis, and data sharing," with the pitch "start fast, work anywhere, scale with ease." For readers new to the field, Esri also publishes a "What is GIS?" primer explaining the underlying technology. If your scenario matches the questions above, the practical next step is to test one location-based question against your existing data rather than adopt a full platform first.