On the Bristol mapping portal, identify the earliest historical map available in the 'Historic basemaps' section. Then, using the map legend, find and list the names of the three local authorities that border Bristol. State the name of the oldest map and the three neighboring authorities.
Navigate to maps.bristol.gov.uk. Click on 'Browse historic basemaps' to view the list of historical maps. Identify the map with the earliest date from the expanded list. Click on the 'Legend' link. Locate the 'Neighbouring authorities' section within the legend. Extract the names of the three neighbouring authorities listed. State the name of the oldest map and the three neighbouring authorities.
The oldest map identified is '1750 Rocque'. The three neighbouring authorities listed are 'Bath and North East Somerset', 'North Somerset', and 'South Gloucestershire'.