---
title: "annotations | Mobile sdk | Mobile sdk android | Android"
description: "com.maptiler.maptilersdk.annotations"
---

> 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.

# annotations

TypesFunctions

## Types

[MTAnchor](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-anchor/)

enum [MTAnchor](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-anchor/) : [Enum](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-enum/index.html)<[MTAnchor](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-anchor/)\>

Anchor positions that describe which point of a marker is aligned to its geographic coordinates.

[MTAnnotation](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-annotation/)

interface [MTAnnotation](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-annotation/)

[MTCustomAnnotationViewClassic](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-custom-annotation-view-classic/)

class [MTCustomAnnotationViewClassic](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-custom-annotation-view-classic/)(context: [Context](https://developer.android.com/reference/kotlin/android/content/Context.html), widthPx: [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html), heightPx: [Int](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-int/index.html), initialCoordinates: [LngLat](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-lng-lat/), initialOffset: [MTPoint](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.types/-m-t-point/) = MTPoint(0.0, 0.0)) : [FrameLayout](https://developer.android.com/reference/kotlin/android/widget/FrameLayout.html), [MTAnnotation](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-annotation/), [MTMapViewContentDelegate](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-m-t-map-view-content-delegate/)

Classic (XML/Views) variant of a custom annotation view that can be added to [MTMapViewClassic](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-m-t-map-view-classic/).

[MTMarker](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-marker/)

class [MTMarker](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-marker/)(val identifier: [String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html) = "mark", \_coordinates: [LngLat](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-lng-lat/)) : [MTAnnotation](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-annotation/)

Annotation element that can be added to the map.

[MTPitchAlignment](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-pitch-alignment/)

enum [MTPitchAlignment](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-pitch-alignment/) : [Enum](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-enum/index.html)<[MTPitchAlignment](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-pitch-alignment/)\>

Controls how marker pitch is aligned when the map is tilted.

[MTRotationAlignment](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-rotation-alignment/)

enum [MTRotationAlignment](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-rotation-alignment/) : [Enum](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-enum/index.html)<[MTRotationAlignment](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-rotation-alignment/)\>

Controls how marker rotation is applied relative to map bearing.

[MTTextPopup](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-text-popup/)

class [MTTextPopup](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-text-popup/)(val identifier: [String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html) = "mark", \_coordinates: [LngLat](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-lng-lat/)) : [MTAnnotation](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-annotation/)

## Functions

[MTCustomAnnotationView](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-custom-annotation-view/)

@[Composable](https://developer.android.com/reference/kotlin/androidx/compose/runtime/Composable.html)

fun [MTCustomAnnotationView](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.annotations/-m-t-custom-annotation-view/)(controller: [MTMapViewController](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-m-t-map-view-controller/), coordinates: [LngLat](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map/-lng-lat/), offset: [MTPoint](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.types/-m-t-point/) = MTPoint(0.0, 0.0), anchor: [Alignment](https://developer.android.com/reference/kotlin/androidx/compose/ui/Alignment.html) = Alignment.Center, modifier: [Modifier](https://developer.android.com/reference/kotlin/androidx/compose/ui/Modifier.html) = Modifier, content: @[Composable](https://developer.android.com/reference/kotlin/androidx/compose/runtime/Composable.html) () -> [Unit](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-unit/index.html))

Compose-based custom annotation view that can be overlaid on top of MTMapView.