The spatial distribution of activities and agents within cities. conceptualised as an urban function. profoundly affects how different areas are perceived and lived. This dataset introduces the concept of functional signatures - contiguous areas of a similar urban function delineated based on enclosed tessellation cells (ETC) - and applies it to the area of Great Britain. https://www.roneverhart.com/1619PA8038-Bosch-Table-Saw-Motor-Housing-4000-4100-Replaces-2610996864/