@cearth/tools/doc/tools.xyz_hpr.tokey.md

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[Home](./index.md) &gt; [@cearth/tools](./tools.md) &gt; [Xyz\_Hpr](./tools.xyz_hpr.md) &gt; [toKey](./tools.xyz_hpr.tokey.md)

## Xyz\_Hpr.toKey() function

<b>Signature:</b>

```typescript
function toKey(value: any): string | undefined;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  value | any |  |

<b>Returns:</b>

string \| undefined