polygon

Source: https://quadriga-dk.github.io/Tabelle-Fallstudie-3/datenvisualisierung/Umsetzung_mit_rshiny_edit.html

See the comment: What is a district polygon? This should be explained briefly. Please add a brief explanation.

<img width="661" height="197" alt="Image" src="https://github.com/user-attachments/assets/8ae40d9c-b988-4760-9b74-4d18bcbc1729" />