1.General evaluation of digital navigation map industry at present: 1.There are 9 licensed digital navigation mapping companies in China; 2.Digital navigation map is the core of the whole navigation industry chain; 3.The upgrade of digital navigation mapping at a large scale largely contributes to the boom of navigation industry 2.To effectively strengthen the management of digital navigation mapping, 5 items shall be taken good care of: market access, map encryption, official examination, map standardization, and market supervision. 3.The basic measures to take to promote digital navigation map industry include: strengthening market supervision, establishing policies, laws, and regulations, promoting platform building, completing standard system, and enhancing resource share.