说明：  画出地貌地形图，熟悉各个matlab语句的掌握与运用，掌握运用插值函数的调用格式，对各种调用函数的格式语句要能够熟练的应用
(Draw terrain map, master and use the MATLAB statement, master the use of interpolation function call forms, application format statement of a function call to be able to )