How to use the map

Single click / tap on any area within the map to gain further information about that layer and any other layers also at that point (in a pop up box).
Double click the map to zoom in.
Use the two smaller ← and → on the popup box to scroll between information for each layer (where applicable).
Search box (magnifying glass icon) - use this to zoom in on a particular location by entering your postcode or town / village.
Find my location (circle icon) - use this to zoom in on your current location (only available with Mobile Location Services enabled on your device).
Reset (arrow icon) - use this to reset the map to the show the whole county.
Back arrow - use this to return to the Durham County Council website.

Background map layer descriptions

Map layer title	Corresponding survey dates	Coverage
Circa 1980-1994	OS National Grid Series Regular edition (continuous revision)	Pre 1974 boundary + current boundary area
Circa 1970-1979	OS National Grid Series Regular edition (continuous revision)	Pre 1974 boundary + current boundary area
Circa 1960-1969	OS National Grid Series Provisional & Regular editions (continuous revision)	Pre 1974 boundary + current boundary area
Circa 1951-1959	OS National Grid Series Provisional & Regular editions (continuous revision)	Pre 1974 boundary + current boundary area
Circa 1938-1950	OS County Series 4th edition (third revision, incomplete) 1937-1942	Pre 1974 boundary + current boundary area
Circa 1919-1926	OS County Series 3rd edition (second revision) 1912-1919	Pre 1974 boundary + current boundary area
Circa 1923	OS County Series 3rd edition (second revision) 1912-1919	Pre 1974 boundary area only. Enhanced image quality
Circa 1894-1899	OS County Series 2nd edition (first revision) 1894-1897	Pre 1974 boundary + current boundary area
Circa 1898	OS County Series 2nd edition (first revision) 1894-1897	Pre 1974 boundary area only. Enhanced image quality
Circa 1856-1865	OS County Series 1st edition 1854-1857	Pre 1974 boundary + current boundary area
Circa 1860	OS County Series 1st edition 1854-1857	Pre 1974 boundary area only. Enhanced image quality