The Great Desert Tracks Simpson Desert Sheet is a double-sided map, with an overview-centric scale of 1:1.1Million on one side and a highly detailed scale of 1:500,000 on the other. The mapping has been fully updated, with GPS surveying and field-checking of roads and tracks done by the Hema Map Patrol. Also included is fuel and provision availability, permit and contact details, and details and map references for interesting spots.