Greetings
from Syncfusion!
Thank
you for reaching out to us. We’ve reviewed the scenario you’ve shared along
with the attached screenshot. By default, when zooming in on maps, the scaling
of the map causes the polygon border width to change. This behavior is
intentional as it helps ensure that maintaining a constant border width across
various zoom levels doesn't obscure surrounding regions, which could make them
harder to view. As a result, the border width adjusts dynamically based on the
zoom level.
Initial
Rendering

After
zooming

In
the screenshot you’ve provided, the border appears thinner than expected, but
we were unable to replicate this issue on our end. To better assist you, could
you kindly provide the following details for further investigation:
- The complete code snippet with the full configuration.
- The MaxZoom value used in your application.
- The steps to reproduce the issue or a video
demonstration.
- Any customizations that have been applied to the map.
Attachment:
MapsPolygon_2433c275.zip