Universal Map Symbol Database Based on the Unit-Parameter Model

Map symbol database is the module that implements the visualization of geographical information.The symbol data can not be shared among the different symbol database.Furthermore,the complex symbols such as cliff and swamp are difficult to be symbolized automatically because there is no parameter used to describe the rule of these symbols.This paper presented a basic unit-parameter model for the map symbols based on the existing research on the map symbol database.Moreover,the unit-parameter model had been extended for the characteristics of the complex symbols.Finally,a universal topographic map symbol database was realized based on the unit-parameter model.