# Welcome to the Highcharts Maps JS (highmaps) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# series.map.data.middleY

The relative mid point of an area, used to place the data label. Ranges from 0 to 1. When `mapData` is used, middleY can be defined there.