Open files or drag them onto the map: GeoPackage, shapefile, GeoJSON, or a .zip of these.

Export selected saves the ticked layers. Files you opened are saved as GeoJSON; layers from an API are downloaded only if your key allows downloads.

Click the map to list the attributes of the features under the cursor in the right-hand panel (× or Esc closes it).

Layer colour square opens the layer's style. ☰ shows its attribute table (press again to hide it): filter, then click a row to zoom to it.

Measure (ruler button on the map): click points, double-click to finish; Esc clears.

API layers load automatically for the current view when they are large. Data from an API is read-only here.