---
title: "BucketPart | JavaScript maps SDK"
description: "Documentation for MapTiler SDK"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Type Alias BucketPart

type BucketPart \= {  
    [parameters](#parameters): [TileLayerParameters](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.TileLayerParameters/);  
    [sortKey](#sortkey)?: number | void;  
    [symbolInstanceEnd](#symbolinstanceend): number;  
    [symbolInstanceStart](#symbolinstancestart): number;  
}

##### Index

### Properties[](#properties)

[parameters](#parameters) [sortKey?](#sortkey) [symbolInstanceEnd](#symbolinstanceend) [symbolInstanceStart](#symbolinstancestart)

## Properties[](#properties-1)

### parameters[](#parameters)

parameters: [TileLayerParameters](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.TileLayerParameters/)

### `Optional`sortKey[](#sortkey)

sortKey?: number | void

### symbolInstanceEnd[](#symbolinstanceend)

symbolInstanceEnd: number

### symbolInstanceStart[](#symbolinstancestart)

symbolInstanceStart: number