This zip file contains the Standard Area
Measurements (SAM) for the electoral areas in the United Kingdom as 31
December 2022. This includes Westminster parliamentary constituencies, Senedd constituencies and electoral regions in Wales, and Scottish Parliament constituencies and regions in Scotland. All measurements provided are ‘flat’ as
they do not consider variations in relief, e.g. mountains and valleys.
Measurements are given in hectares (10,000 square metres) to 2 decimal places.
Four types of measurements are included: total extent (AREAEHECT), area to mean
high water (coastline) (AREACHECT), area of inland water (AREAIHECT) and area
to mean high water excluding area of inland water (land area) (AREALHECT). The
Eurostat-recommended approach is to use the ‘land area’ measurement to compile
population density figures.