NAVA, GPS Land measurement is a new high-tech product , which is functioned with Area & Length & Circumference & Price setting & total fare calculation. It measures the length width and area of the farmland through satellites, and also has the function of unit price set and fare calculating. The product has been widely used in manyagricultural activities for its creative handheld design and high performance and price ratio. NAVA land measurement GPS is a very helpful tool for users' outdor land measurement. It enjoys high reputation from users especially from forestry and agriculture.