Simulation for Coastline Based on GIS and Fractal
基于GIS和分形理论的海岸线模拟方法研究

In order to discuss the micromechanism and the simulating method of the curve like coastline. On the basic of the method calculating fractal dimension, and taking the Jiangsu Province coastline as an example, this paper uses the midpoint subdivision interpolation method and the Koch curve method to explore the simulated coastline generation. It puts emphases on the method of Koch curve; introduces its principle of realization and its process of simulation. According to different conditions and needs for simulation, it can not only simulate a section of coastline, calculate its dimension, but also can generate the coastline which dimension is appointed. By this way and with the support of GIS technology, the author designs a utility programmer for simulation based on fractal, and introduces flow of the programmer and analyzes its function in brief. Finally, the coastline of Jiangsu which scale is 1:2000000 is simulated by this program. Finally,some significant conclusions are drawn:(1)the coastline has the fractal character, it's self simulation. (2)the degree of the coastline is direct proportion to the fractal dimension. (3)if the method of simulation is different, the result is also not the same. (4)the technology of GIS is fitting for simulating the coastline.