1. C# tutorial

  • 1.19. C # nested loop

    C # allows you to use another loop within one loop, and here are a few examples to illustrate this concept. 1.19.1. Gra...
    2025-10-25 13:34:33 UTC
  • 1.20. C # break statement

    In C # break statement has the following two uses: When break statement occurs within a loop, the loop terminate...
    2025-10-25 13:34:38 UTC
  • 1.21. C # continue statement

    In C # continue sentence is a bit like break statement. But it’s not a forced termination. continue code in the ...
    2025-10-25 13:34:40 UTC
  • 1.22. C # package

    Encapsulation is defined as “enclosing one or more projects in a physical or logical package”. In object-oriented programmin...
    2025-10-25 13:34:34 UTC
  • 1.23. C # method

    One way is to organize some related statements together to perform a block of statements for a task. Every C# program has at...
    2025-10-25 13:34:34 UTC
  • 1.24. C # nullable type

    1.24.1. C# single question mark ? and double question mark ?? # ? single question mark is used for int ...
    2025-10-25 13:34:38 UTC
  • 1.25. C # Array

    An array is a sequential collection of fixed sizes that stores elements of the same type. An array is a collection used to s...
    2025-10-25 13:34:37 UTC
  • 1.26. C # multidimensional array

    C # supports multidimensional arrays. A multidimensional array is also called a rectangular array. You can declare a str...
    2025-10-25 13:34:39 UTC
  • 1.27. C # interlaced array

    A staggered array is an array. An interlaced array is an one-dimensional array. You can declare a file with a int st...
    2025-10-25 13:34:41 UTC
  • 1.28. C # passes an array to the function

    In C #, you can pass an array as an argument to a function. You can pass a pointer to the array to the function by specifyin...
    2025-10-25 13:34:34 UTC
  • 1.29. C # parameter array

    Sometimes, when you declare a method, you cannot determine the number of parameters to pass to the function as arguments. Th...
    2025-10-25 13:34:37 UTC
  • 1.30. C # Array class

    Array class is the base class for all arrays in C #. It is defined in the System , which is defined in the namespace...
    2025-10-25 13:34:39 UTC
  • 1.31. C # string

    In C #, you can use character arrays to represent strings, but it is more common to use the string keyword to declare a ...
    2025-10-25 13:34:42 UTC
  • 1.32. C # structure

    In C #, structures are value type data structures. It enables a single variable to store related data of various data types....
    2025-10-25 13:34:41 UTC
  • 1.33. C # enumeration

    An enumeration is a set of named integer constants. Enumerated types are made using the enum keyword. The C # enumerat...
    2025-10-25 13:34:32 UTC
  • 1.34. C # Class

    When you define a class, you define a blueprint for data types. This does not actually define any data, but it defines what ...
    2025-10-25 13:34:37 UTC
《地理信息系统原理、技术与方法》  97

最近几年来,地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持,如城市管理、区划、环境整治等等,地理信息成为信息时代重要的组成部分之一; “数字地球”概念的提出,更进一步推动了作为其技术支撑的GIS的发展。 与此同时,一些学者致力于相关的理论研究,如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面,并且这两个方面构成了相互促进的发展过程。