Azure maps geometry features help needed

[Saul_Ring]

Hi all, 

I ran into an issue which I think others did as well. I have 33,755 polygons that I want to show in azure map visual but after uploading Geojson file some of the polygons do not show at all. I tried LSOA21 BFC, LSOA21 BFE shape files to convert into geojson format via mapshaper as BFE are full features file and takes a lot of MBs. So I wonder if it is due to azure limitations to render so many polygons and some are silently dropped? is it geometry features (Vetrices, rings, interesctions)? Or am I doing something wrong? Any help would be kindly appreciated.. 

[Zanqueta]

This issue is likely related to rendering limitations in the Azure Maps visual within Power BI. When working with large GeoJSON files containing thousands of polygons, some features may be silently dropped due to performance constraints.

Here are three concise recommendations:

1. Simplify the polygons using https://mapshaper.org/ with the command simplify 10% keep-shapes to reduce the number of vertices while preserving the overall shape.
2. Split the GeoJSON file into smaller segments (e.g. by region or category), as files exceeding approximately 5MB may not render fully in the visual.
3. Validate geometries to ensure there are no topological errors such as self-intersections or improperly closed rings. The clean command in Mapshaper can assist with this.

For further details, refer to the official documentation:

Get started with Azure Maps Power BI visual - Microsoft Azure Maps | Microsoft Learn

✅ If this anser resolved your issue, please mark it as correct to assist other members of the community.

[v-menakakota]

Hi @Saul_Ring ,

Thanks for reaching out to the Microsoft fabric community forum. 

I would also take a moment to thank  @Zanqueta  , for actively participating in the community forum and for the solutions you’ve been sharing in the community forum. Your contributions make a real difference.

Please go through the below solved issue which may help you in resolving the issue

Solved: Best approach to visualize 100k polygons in a Powe... - Microsoft Fabric Community

If I misunderstand your needs or you still have problems on it, please feel free to let us know. 

Best Regards, 
Community Support Team

[v-menakakota]

Hi @Saul_Ring ,
I hope the above details help you fix the issue. If you still have any questions or need more help, feel free to reach out. We’re always here to support you .

Best Regards, 
Community Support Team  

[v-menakakota]

Hi @Saul_Ring ,
I hope the above details help you fix the issue. If you still have any questions or need more help, feel free to reach out. We’re always here to support you .

Best Regards, 
Community Support Team  

[Saul_Ring · Accepted solution]

Thank you for the support and advice. I ended up excluding some regions to stay below the 30k polygons threshold which is working fine. 

[v-menakakota]

Hi @Saul_Ring ,

Thank you for the update. Please continue to use the Fabric Community Forum.

Best Regards, 
Community Support Team.

[Saul_Ring]

after some experimenting I feel that perhaps there is a limit on number of polygons that are displayed which is 30k, anything above and we start seeing gaps. Can someone confirm if this is the case (limits on number of polygons)? I added region by region, as soon as i hit 30,400 gaps started appearing. I used simplify 20% via mapshaper (keep-shapes).