Guide
What Is GIS? A Plain-English Guide for Business Owners
Short answer
GIS, short for geographic information system, is software that stores information together with where it happens, so you can map it, analyze it and share it. A spreadsheet of customer addresses becomes a map that shows where your work comes from, which neighborhoods are worth advertising in, and how far your crews drive. Cities use GIS for parcels and zoning, utilities for pipes and meters, 911 centers for addresses, and small businesses for customers and service areas.
The three things GIS does
- Stores where. Every record has a location: a point for a customer, a line for a water main, a shape for a flood zone.
- Answers questions. Which customers are within 10 miles? Where do jobs cluster? Which assets are oldest and closest to the river?
- Shares the answer. As a map, a live dashboard, a public map viewer, or a field app crews use on their phones.
Layers: the idea that makes it click
A GIS map is a stack of layers, like transparent sheets. One layer holds your customers, another holds roads, another holds county boundaries, another holds aerial imagery. Because every layer knows where it is, you can ask questions across them: “show me customers inside the flood zone” is one layer filtered by another.
Layers come in two kinds. Vector layers are points, lines and shapes with a table of information behind them, like customers, pipes or parcels. Raster layers are grids of pixels, like aerial photos, drone imagery or elevation.
Questions GIS answers for real businesses
| Who | The question | What the map shows |
|---|---|---|
| Home service company | Where should the next yard signs and mailers go? | A heat map of past jobs by neighborhood |
| Contractor | Is this job worth the drive? | Rings of drive distance around the shop |
| Nonprofit | Who are we reaching, and who are we missing? | Participants by ZIP code over income or school data |
| Property manager | Which buildings need attention first? | Assets colored by age, condition and last inspection |
| City or utility | What was damaged, and where? | A live damage assessment dashboard after a storm |
The tools people use
- ArcGIS from Esri is the most common professional platform: ArcGIS Pro on the desktop, ArcGIS Online for web maps, dashboards and field apps.
- QGIS is free, open-source desktop GIS that handles most mapping and analysis.
- Google My Maps is fine for a simple map with a few pins, but it isn’t built for analysis.
Which to pick is its own question. See QGIS vs. ArcGIS Online.
My take
Start with a question, not a map. A map is only useful if it answers something you’d otherwise guess at. Over ten years I’ve built a public map viewer for a city, asset management for water utilities and a hurricane damage dashboard, and every one of them started with a plain question someone needed answered quickly. Bring the question, and the map follows.
Want to see it with your own address? Try the live map demo: a year of jobs for a sample business, shown three ways.
Questions, answered
What does GIS stand for?
Geographic information system: software that stores, analyzes and shares information tied to a location.
Is Google Maps a GIS?
Not really. Google Maps is a map and navigation service. A GIS lets you load your own data, ask questions across layers and publish the results as maps, dashboards or apps.
What is the difference between GIS and GPS?
GPS tells you where something is. GIS stores that location with information about it and lets you map and analyze it.
Can a small business use GIS?
Yes. Mapping customers, jobs and service areas helps decide where to advertise, how far to travel and which neighborhoods bring in the most work.