eBay Store Design by Visualsoft France 1:25K map 3537ET: Guillestre Vars Risoul & PNR du Queyras hiking walking £15.500 | The IGN TOP25 / Series Blue map 3537 ET covers Guillestre / Vars / Risoul / PNR du Queyras, France. Ask a Question Description About the map Series IGN’s (Institut Géographique National) TOP25 / Série Bleue is a set of 1:25,000 scale topographic maps covering France and are the French equivalent of Ordnance Survey maps. Please note that this map series is being revised by IGN. The format and presentation are indicated by the letters at the end of the four-digit sheet reference number (ET, OT, OTR, SB etc. – please see below). TOP 25 Ending in ET or OT. Single-sided covering approx. 29×21 km / 18×13 miles. Ending in ETR or OTR. These are the waterproof and tear-resistant version of the above but on a smaller double-sided sheet. All include an English legend, tourist information and highlight walking trails including long-distance GR routes, Ski routes (If relevant) and cycle routes. Série Bleue (Series Blue) Ending in SB. A single-sided map with full tourist information covering approx. 29x24km / 18×15 miles. Includes an English legend, tourist information and highlight walking trails including long-distance GR routes, Ski routes (If relevant) and cycle routes. Ending In E (East) or O (West). Single-sided map covering approx. 14x20km / 9×12 miles. The map legend is in French only and doesn’t include tourist information. eBay Store Design by Visualsoft