---
title: "FeaturePositionMap | 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.

# Class FeaturePositionMap

##### Index

### Constructors[](#constructors)

[constructor](#constructor)

### Properties[](#properties)

[ids](#ids) [indexed](#indexed) [positions](#positions)

### Methods[](#methods)

[add](#add) [getPositions](#getpositions) [deserialize](#deserialize) [serialize](#serialize)

## Constructors[](#constructors-1)

### constructor[](#constructor)

-   new FeaturePositionMap(): FeaturePositionMap[](#constructorfeaturepositionmap)
    
    #### Returns FeaturePositionMap
    

## Properties[](#properties-1)

### ids[](#ids)

ids: number\[\]

### indexed[](#indexed)

indexed: boolean

### positions[](#positions)

positions: number\[\]

## Methods[](#methods-1)

### add[](#add)

-   add(id: unknown, index: number, start: number, end: number): void[](#add-1)
    
    #### Parameters
    
    -   id: unknown
    -   index: number
    -   start: number
    -   end: number
    
    #### Returns void
    

### getPositions[](#getpositions)

-   getPositions(id: unknown): [FeaturePosition](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.FeaturePosition/)\[\][](#getpositions-1)
    
    #### Parameters
    
    -   id: unknown
    
    #### Returns [FeaturePosition](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.FeaturePosition/)\[\]
    

### `Static`deserialize[](#deserialize)

-   deserialize(obj: [SerializedFeaturePositionMap](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedFeaturePositionMap/)): FeaturePositionMap[](#deserialize-1)
    
    #### Parameters
    
    -   obj: [SerializedFeaturePositionMap](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedFeaturePositionMap/)
    
    #### Returns FeaturePositionMap
    

### `Static`serialize[](#serialize)

-   serialize(  
        map: FeaturePositionMap,  
        transferables: ArrayBuffer\[\],  
    ): [SerializedFeaturePositionMap](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedFeaturePositionMap/)[](#serialize-1)
    
    #### Parameters
    
    -   map: FeaturePositionMap
    -   transferables: ArrayBuffer\[\]
    
    #### Returns [SerializedFeaturePositionMap](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.SerializedFeaturePositionMap/)