# Map - Heatmap

When you have tons of location data points being displayed as dots on Map, it’s hard to understand the trend. This is when you want to consider using Heatmap on Map, which makes it easier to identify the trends or patterns of geographical data at glance.

![](/files/-M4oNBEFd0duoPYE7GNW)

## Column Assignments

* Longitude - Assign a column that has longitude values.
* Latitude - Assign a column that has longitude values.
* Value - Assign a numeric column for values.

## Save as an Image

You can save the chart as an image file. See [Save as PNG/SVG](/visualization/features/save.md) for more details.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.exploratory.io/visualization/types/maphmap.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.