STUDY ON THE METHODS OF AUTOMATIC CONSTRUCTING OF CHART MATHEMATICAL FOUNDATION
S. Li, Y. Zheng, W. Huang, G. Li, X. Dai
Department of hydrography and cartography,
In the 21 century men have a rapid increase for requirement of charts with the utilization and exploitation of ocean resources. Improving the automatization of chart production and decreasing the periods of production are the key questions to study. Chart precision is determined by chart mathematical foundation, whose level of automatization decides other factors’ quality on charts. Thus it is significant to study on the automatization of constructing chart mathematical foundation. In this paper, the integrated system model is designed based on the practice of chart manufacture and automatic methods, several subsystem data modules are set up and the main calculating program is put forward. In conclusion, abundant calculating experiments are carried out, which prove the scientific composing of the system and the validity of the calculating models. Then the constructing of chart mathematical foundation is realized automatically. All the methods to calculate and plot grids, control points and linear scales are more accurate and rapider than other methods by comparing with them.