# Adding data to the map

## Core concepts

The visual allows you to add up to three layers to the map at once, which can be styled and symbolised separately. There is a marker points layer, a features layer, and a reference layer.

The **marker points** layer can contain point-based data from your Power BI data model, which can be supplied either as coordinates, postcodes, or UPRNs.

The **features layer** can contain point, line, or polygon data which can be supplied in one of three ways: directly from your data model as WKT or GeoJSON; geocoded from GSS codes in your data model; or
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matched from a column in your data to features in a spatial dataset that you can upload into the visual.

Finally the **reference layer** can contain reference data such as administrative boundaries which are geocoded from GSS codes but are not matched to any specific data from your data model.

## Creating and styling map layers

The pages below include detailed guides on creating and styling a point map within the visual:

* [Creating a point map](https://docs.os.uk/os-downloads/upcoming-products/beta-products-information/os-maps-for-power-bi-visual-beta-product/os-maps-for-power-bi-visual-getting-started-guide/adding-data-to-the-map/creating-a-point-map)
* [Styling points on the map](https://docs.os.uk/os-downloads/upcoming-products/beta-products-information/os-maps-for-power-bi-visual-beta-product/os-maps-for-power-bi-visual-getting-started-guide/adding-data-to-the-map/creating-a-point-map-using-categorical-data)
* [Creating a map with polygons or other features](https://docs.os.uk/os-downloads/upcoming-products/beta-products-information/os-maps-for-power-bi-visual-beta-product/os-maps-for-power-bi-visual-getting-started-guide/adding-data-to-the-map/creating-a-map-with-polygons-or-other-features)
* [Styling features on the map](https://docs.os.uk/os-downloads/upcoming-products/beta-products-information/os-maps-for-power-bi-visual-beta-product/os-maps-for-power-bi-visual-getting-started-guide/adding-data-to-the-map/styling-features-on-the-map)