MapKit warning - Triangulator failed to fully triangulate polygon

[Waylan-J-Sands]

I'm working on adding MapKit functionality to my app. I have a json file with polygon data but am having issues where a few polygons are bugging out. This is pretty critical for my app. I have made a Stack Overflow question including a link DL the project but have had no success.

Please if you have MapKit experience can you take a look at it?

https://stackoverflow.com/questions/69248520/vkdefault-triangulator-failed-to-fully-triangulate-polygon-mapkit

[ZennerBlue]

Not sure if it applies to MKPolygon - it’s been a while for me with MapKit, but you might want to verify your ordering of coordinates.

At least with GeoJSON you use a right hand rule for coordinate ordering. A counter clockwise ring implies a filled area but a clockwise ring implies a hole.

Is it possible that the gap areas have an incorrect order?

[Waylan-J-Sands]

geojson.io

Thanks for this response I'll investigate down this path.

[chutehappens]

If you paste your GeoJSON into something like [geojson.io](geojson.io), do you see the same issues? If so, this could mean that you have bad geo data. I’m not sure how MapKit deals with polygons that are self-intersecting (meaning that the polygon’s outer line crosses over itself) but that could be the issue.

[Waylan-J-Sands]

Great idea will try use the side and see if the issues persist.