Digital national land information

The digital land data maintained in the Geographic Survey Institute are listed in Tab 1. They are computerized for the digital national land information to establish a geographical data bank of land information.The digital national land information contains many kinds of land data, which have been maintained mainly as maps, aerial photos and statistics, and is stored as magnetic tape.The smallest geographical unit is either the standard mesh, geodetic coordinate or dots, according to accuracy of the original data.The digital national land information can be used in the various fields of geographical researches and in national or local land planning.In this paper, as an example of application, the housing land selection method is introduced, using the natural land data and the land use data.