Abstract: The project of Digital Land is the infrastructure construction of country and is concerned with many fields. It aims to make good use of the resources by the informatization of the resources so asto the promote the sustainable development of the national economy. As the project thus developed includes big data generating, transformation, and updating, it should be supported by the wide band and 3S integration technique as well as related technical achievements. It is necessary for the multi source data to have the uniform standard of database so that it can achieve the sharing of resources. Accordingly the model set up is multi dimensional and can support land resources planning, land management, mine development and other decision making. At the same time, the project should obey the principle of uniform plan and goal.