Heatmap
A Heatmap turns scattered points into a smooth gradient of color, making density and hotspots obvious at a glance. It's the go-to visualization when the story is "where is there more or less of something."
Control radius, intensity, and the color ramp until the hotspots read clearly. Connect a Google Sheet to keep the heatmap live.
What you can do
- Adjustable intensity & radius
- Custom color gradients
- Optional weight column
How to create a heatmap
- 1
Create a Heatmap
Start a new site and choose the Heatmap type.
- 2
Add point data
Upload a file or connect a Google Sheet with a latitude and longitude per row.
- 3
Tune the gradient
Set radius, intensity, and a custom color ramp, and pick a weight column if some points should count for more.
- 4
Publish
Embed the heatmap or publish it to your domain.
Heatmap FAQ
What data does a heatmap need?
Point data with a latitude and a longitude per row — nothing else is required. Every point counts equally unless you map a numeric column as the weight, in which case higher values contribute more heat.
How many points does a heatmap need to be meaningful?
Enough that density is a real signal rather than an accident — a few hundred at minimum, and ideally thousands. A heatmap of fifteen points implies a smooth surface the data cannot support; use a cluster map when individual points still matter.
Step-by-step guides
Turn a spreadsheet into an interactive map — plus the coordinate problems that cause nine out of ten failed imports, and what to do if you only have addresses.
Clustering keeps a dense point map readable — and donut clusters encode a second dimension. How to set both up, plus when a heatmap is the better call.
Turn location data into a clear geographic heatmap — how many points you need, why radius matters most, and the sampling caveat worth stating.
Heatmaps and choropleth maps answer different questions. When to use each, and the specific mistake each one invites if you pick wrong.