500,000 centred on Lyneham, coverage of the area where Vines have lived since 1600s

200,000 centred on Calne, Lyneham and Purton gives local coverage

            Calne------ Melksham, Chippenham, Blackland, East Tytherton, Bremhill, Foxham, Spirthill,
                                     Hilmarton, Goatacre, Broad Hinton
            Lyneham--Malmesbury, Brinkworth, Wootton Bassett, Bremhill, Hullavington, Sutton Benger,
                                    Dauntsey, Great Somerford, Seagry, Lydiard Trogoze, Hook, Grittenham, Tockenham
            Purton-----Swindon, Wootton Bassett, Brinkworth, Grittenham, Lydiard Tregoze, Highworth, Minety
   
25,000 centred on places of interest, eg Grittenham; use aerial coverage with the overlay map, for close examination