# Open Street Maps Provider

`RadMap` supports displaying tile data from the [Open Street Map](https://www.openstreetmap.org/) services via the `OpenStreetMapProvider` class. You have the option of passing an API key to it. This key is needed for the Transport and Cycle maps, which come from [ThunderForest](https://www.thunderforest.com/). You can check the [following page](https://www.thunderforest.com/docs/apikeys/) in order to learn how to obtain an API key.

**OpenStreetMapProvider with API key in Xaml**

```XAML
<telerik:RadMap x:Name="radMap" ZoomLevel="1">
    <telerik:RadMap.Provider>
        <telerik:OpenStreetMapProvider APIKey="your-api-key" />
    </telerik:RadMap.Provider>
</telerik:RadMap>
```

**OpenStreetMapProvider set in code**

```C#
OpenStreetMapProvider openStreetMap = new OpenStreetMapProvider("your-api-key");
this.radMap.Provider = openStreetMap;
```

```VB.NET
	Dim openStreetMap As New OpenStreetMapProvider("your-api-key")
	Me.radMap.Provider = openStreetMap
```

## Attribution Copyright Label

When using the OpenStreetMapProvider, you have to display an attribution copyright label to the Open Street Map services. To learn more about the accurate copyright label's content, please refer to the [OpenStreetMap Attribution Guideline](https://osmfoundation.org/wiki/Licence/Attribution_Guidelines) article.

> tip To learn how to customize the RadMap to allocate space for displaying an element containing a sample attribution copyright label, check this [article](https://www.telerik.com/products/wpf/documentation/knowledge-base/kb-map-copyright-label).

## Setting a User-Agent

The OpenStreetMapProvider class provides the option of passing a User-Agent header, which will be used in the web request for downloading the tiles from the Standard tile layer. This allows for compliance with the [OpenStreetMaps Tile Usage Policy](https://operations.osmfoundation.org/policies/tiles/).

> important If a User-Agent is not provided, the Standard layer tiles will not be downloaded.

The following two examples demonstrate how you can pass such a User-Agent.

**Setting StandardModeUserAgent in Xaml**

```XAML
<telerik:RadMap x:Name="radMap1" ZoomLevel="1">
    <telerik:RadMap.Provider>
        <telerik:OpenStreetMapProvider APIKey="your-api-key" StandardModeUserAgent="your custom user agent string" />
    </telerik:RadMap.Provider>
</telerik:RadMap>
```

**Setting StandardModeUserAgent in code**

```C#
OpenStreetMapProvider openStreeMapProvider = new OpenStreetMapProvider("your-api-key")
{
    StandardModeUserAgent = "your custom user agent string"
};
```

```VB.NET
	Dim openStreeMapProvider As New OpenStreetMapProvider("your-api-key") With {.StandardModeUserAgent = "your custom user agent string"}
```