# Measurement System

Most countries use the metric system for measurements (e.g., kilometers, Celsius), while others, like the USA, use the imperial system (e.g., miles, feet, Fahrenheit). Ridy supports both systems in its client-side apps. To change the default system from metric to imperial, navigate to `<app>->lib->config->env.dart` and update the `defaultMetricSystem` value.

<pre class="language-dart" data-title="constants.dart" data-full-width="false"><code class="lang-dart">...
  static const List&#x3C;double> walletPresets = [10, 20, 50];
  static const MapProviderEnum defaultMapProvider = MapProviderEnum.mapBox;
<strong>  static const MeasurementSystem defaultMeasurementSystem = MeasurementSystem.imperial;
</strong>}
</code></pre>


---

# 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://flutter-docs.taxi.ridy.io/configuration/measurement-system.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.
