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In this article, you will learn how to add a heat map layer to an Azure Maps visual in Power BI.
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:::image type="content" source="media/power-bi-visual/heat-map.png" alt-text="Heat map layer in Azure Maps Visual for Power BI.":::
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Heat maps, also known as density maps, are a type of overlay on a map used to represent the density of data using different colors. Heat maps are often used to show the data “hot spots” on a map. Heat maps are a great way to render datasets with large number of points. Displaying a large number of data points on a map will result in a degradation in performance and can cover it with overlapping symbols, making it unusable. Rendering the data as a heat map results not only in better performance, it helps you make better sense of the data by making it easy to see the relative density of each data point.
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A heat map is useful when users want to visualize vast comparative data:
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## Prerequisites
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-An Azure Maps visual in Power BI as described in [Getting started with the Azure Maps visual for Power BI](/power-bi-visual-getting-started.md).
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-[Getting started with the Azure Maps visual for Power BI](/power-bi-visual-getting-started.md).
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-[Understanding layers in the Azure Maps visual for Power BI](/power-bi-visual-understanding-layers.md).
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## Add the heat map layer
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To create the Heat map layer, switch the **Heat map** toggle to **On** in the **Format** pane.
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1. In Power BI Desktop, select the Azure map that you created.
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1. In the **Format** pane, switch the **Heat map** toggle to **On**.
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:::image type="content" source="media/power-bi-visual/heat-map.png" alt-text="Heat map layer in Azure Maps Visual for Power BI":::
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Now you can adjust all the Heat map layer settings to suit your report.
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## Heat map layer settings
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| Min zoom |Minimum zoom level the layer is visible at. Valid values are 1 to 22. Default: **0**|
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|Max zoom |Maximum zoom level the layer is visible at. Valid values are 1 to 22. Default: **22**|
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|Layer position |Specify the position of the layer relative to other map layers. Valid values include **Above labels**, **Below labels** and **Below roads**|
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## Next steps
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Change how your data is displayed on the map:
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> [!div class="nextstepaction"]
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> [Add a bar chart layer](power-bi-visual-add-bar-chart-layer.md)
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Add more context to the map:
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> [!div class="nextstepaction"]
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> [Add a reference layer](power-bi-visual-add-reference-layer.md)
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> [!div class="nextstepaction"]
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> [Add a tile layer](power-bi-visual-add-tile-layer.md)
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