---
title: "MTLineLayer.sourceLayer | Mobile sdk | Mobile sdk android | Android"
description: "sourceLayer"
---

# MTLineLayer.sourceLayer

@SerialName(value = "source-layer")

open override var [sourceLayer](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.line/-m-t-line-layer/source-layer/): [String](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-string/index.html)?

Layer to use from a vector tile source.

Required for vector tile sources; prohibited for all other source types, including GeoJSON sources.