How It Works:

• Configuration Merging: The map uses the base configuration defined in data-config OR data-config-url on the map div. URL parameters selectively update specific properties without replacing the entire config.
• Share Button: The Share button appears automatically because data-shared attribute is present on the map div.
• URL Parameters: When applying a share URL, the following properties are updated:
  • p - Projection (e.g., 3857, 3978)
  • z - Zoom level
  • c - Center coordinates (lon,lat in EPSG:4326)
  • b - Basemap options (basemapId, shaded, labeled)
  • keys - Layer UUIDs to add (comma-separated)
• Layer Behavior: Layers from URL parameters (keys) are appended to existing layers defined in data-config OR data-config-url. Base config layers are preserved, not replaced.
• Example: If the base config has layer A, and the URL has keys=B,C, the final map will display layers A, B, and C.