---
title: "MTFillExtrusionLayer.base | Mobile sdk | Mobile sdk android | Android"
description: "base"
---

# MTFillExtrusionLayer.base

var [base](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.fillextrusion/-m-t-fill-extrusion-layer/base/): [Double](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin/-double/index.html)?

The height with which to extrude the base of this layer. Units in meters. Must be ≤ height. Defaults to 0. Requires [height](https://docs.maptiler.com/mobile-sdk/android/api/-map-tiler-s-d-k/com.maptiler.maptilersdk.map.style.layer.fillextrusion/-m-t-fill-extrusion-layer/height/).