---
title: "MTFillLayer.sortKey | Mobile sdk | Mobile sdk android | Android"
description: "sortKey"
---

> 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.

# MTFillLayer.sortKey

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

Key for sorting features.

Features with a higher sort key will appear above features with a lower sort key.