Azure Maps Reference Layer in Power BI won’t load GeoJSON from Azure Blob (URL works in browser)

[MagdaS]

I’m trying to add a Reference layer to the Azure Maps visual in Power BI using a GeoJSON hosted on Azure Blob Storage. The direct URL opens fine in the browser (also in incognito), but the layer doesn’t render in Power BI—no shapes appear.

What I’ve tried

• Content-Type on the blob is set to application/json.

• File opens as raw JSON in the browser (no login), including in Incognito.

• Ensured HTTPS.

• Checked the GeoJSON structure: FeatureCollection → Feature with Polygon, coordinates are [longitude, latitude], outer ring closed (last point equals first).

• SAS URL with Read (sp=r), Blob (sr=b), HTTPS only, future expiry.

  CORS on the Storage Account → Blob service:

  • Allowed origins: https://app.powerbi.com

  • Methods: GET

  • Allowed headers: *

  • Exposed headers: *

  • Max age: 360

[Shahid12523]

Power BI’s Azure Maps reference layer won’t always load GeoJSON from a SAS blob even if the URL works in a browser. Common issues:

1.CORS/SAS: Power BI may not handle SAS URLs well. Test with a public blob or add https://*.powerbi.com to allowed origins.

2.GeoJSON format: Must be FeatureCollection, polygons as [ [ [lng, lat], … ] ], outer ring clockwise.

3.HTTPS & direct response: No redirects; Content-Type = application/json; inline response.

4.File size: Very large or many features can fail silently.

Workarounds:

Make blob public temporarily.

Host on GitHub or Azure Static Website.

Embed small GeoJSON directly in Power BI.