---
title: maximumZ
framework: mapkitjs
role: symbol
role_heading: Instance Property
path: mapkitjs/tileoverlay/maximumz
---

# maximumZ

The maximum zoom level for a tile overlay.

## Declaration

```data
get maximumZ(): number | null;
set maximumZ(maximumZ: number | null);
```

## Discussion

Discussion The maximumZ value defaults to the maximum zoom level of MapKit JS tiles. The zoom level can go higher and expands the map’s zoom range, if necessary. MapKit JS requests the overlay tiles when the map is below or at this zoom level. The default value is null.

## See Also

### Setting overlay appearance

- [opacity](mapkitjs/tileoverlay/opacity.md)
- [minimumZ](mapkitjs/tileoverlay/minimumz.md)