# Catchments
This module returns demographic profile of an area with given travel time and travel mode around a selected point.
*Fig. 5.1. Catchment settings: walking or driving, travel time in minutes.*
*Fig. 5.2. Catchment isochrone representing 45 minutes of travel time driving around location in West London along with area demographic grid surface.*
Catchment GeoJSON object can be copied using \`Copy to clipboard\` button and reused within any other platform where GeoJSON format is supported. It can be pasted as a layer directly to QGIS.
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# 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://geolytix.gitbook.io/xyz-user-guide/catchments.md?ask=
```
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.