Map sheet number 225 in the OS Explorer series covers the area around Huntingdon & St Ives in Cambridgeshire. Highlights of the area include: Godmanchester, St Neots, Grafham Water & the Three Shires Way & Ouse Valley Way recreational paths. 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 Explorer map for Huntingdon & St Ives is available in both the standard paper version & weatherproof ' Active' version.