---
title: "Catchment area"
url: "https://kb.retailsonar.com/en/article/catchment-area"
language: "en"
last_updated: "2024-03-19T12:58:33.373Z"
---

# Catchment area

A catchment area is the **collection of zones** **that can be reached within a specific** [**​**](https://app.getguru.com/card/cXX8BBki/Drivetime)**travel time for a given mode of transportation.** The catchment area can be subdivided into a **primary**, **secondary** and **tertiary catchment area**. 

![](https://cdn-assets.productfruits.com/3c2aa47d-8482-4004-81c8-196cbc320d0c)

The travel times are typically calculated in such a way that, when applied to the entire network, the **primary catchment area** represents 25% of current sales, the **secondary catchment area** represents 50% of current sales, and the **tertiary catchment area** represents 75% of current sales.

![](https://cdn-assets.productfruits.com/a99646b7-06fb-4dfd-8730-2444d103e7a1)

  
 

In other words, the primary catchment area corresponds to the isochrone of which the zones represent 25% of the current sales for the entire network. While the travel times are derived by looking at the entire network of locations, it can be applied to a single location. 

Performing an analysis within an isochrone is a **location centric approach**.