---
title: "heatmap.opacityConst | Mobile sdk | Mobile sdk android | Android"
description: "opacityConst"
---

# heatmap.opacityConst

fun [MTHeatmapLayer](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.heatmap/-m-t-heatmap-layer/).[opacityConst](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.heatmap/opacity-const/)(value: [Double](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-double/index.html)): [MTHeatmapLayer](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.heatmap/-m-t-heatmap-layer/)