Map sheet number 162 in the OS Landranger series covers the Forest of Dean, Gloucester, Monmouth (Trefynwy), Nailsworth, Dursley, Stroud, Ross-on-Wye, Thornbury & Chepstow (Cas-Gwent). Other highlights include: the north-western area of the Cotswolds Hills, the River Severn & the Offa's Dyke Path. The map covers an area of 40 km by 40 km (25 miles by 25 miles). With this map you will receive a code for use on your i OS or Android smartphone or tablet. Find our more at Mobile Download FAQ. The OS Landranger map for Gloucester & Forest of Dean is available in both the standard paper version & weatherproof " Active" version.