8. Scala

  • 8.1. Scala tutorial

    Scala is a multi-paradigm programming language, which is designed to integrate the features of obje...
    2023-11-09 23:00:02 UTC
  • 8.2. Scala introduction

    Scala, which stands for Scalable Language, is a multi-paradigm programming language. Martin Odersky of the Fe...
    2023-11-09 23:00:02 UTC
  • 8.3. Scala installation

    Scala language can run on Window, Linux, Unix, Mac OS X and other systems. Scala is based on java, using a lo...
    2023-11-13 23:00:02 UTC
  • 8.4. Scala basic syntax

    If you used to be a Java programmer and know the basics of the Java language, you can quickly learn the basic syntax o...
    2023-11-13 23:00:02 UTC
  • 8.5. Scala data type

    Scala and Java have the same data types, and the following table lists the data types supported by Scala: ...
    2023-11-13 23:00:02 UTC
  • 8.6. Scala variable

    A variable is an easy-to-use placeholder that refers to the computer’s memory address, and it takes up a certain amoun...
    2023-11-13 23:00:02 UTC
  • 8.7. Scala access modifier

    The Scala access modifier is basically the same as Java’s: private,protected,public. If no access modifier is...
    2023-11-13 23:00:02 UTC
  • 8.8. Scala operator

    An operator is a symbol that tells the compiler to perform specified mathematical and logical operations. Sca...
    2023-11-14 23:00:02 UTC
  • 8.9. Scala IF…ELSE statement

    A Scala IF…ELSE statement is a block of code that determines execution by the execution result of one or more statemen...
    2023-11-13 23:00:02 UTC
  • 8.10. Scala cycle

    Sometimes, we may need to execute the same piece of code multiple times. In general, statements are executed sequentia...
    2023-11-13 23:00:02 UTC
  • 8.11. Scala while cycle

    As long as the given condition is true in the Scala language while ...
    2023-11-14 23:00:02 UTC
  • 8.12. Scala do…while cycle

    Not like the while loop tests the loop condition in the loop header, inthe Scala language ...
    2023-11-14 23:00:02 UTC
  • 8.13. Scala for cycle

    A for loop allows you to write a loop control structure that executes a specified number of ...
    2023-11-15 23:00:02 UTC
  • 8.14. Scala break statement

    There is no break statement by default in the Scala language, but you can implement it in another way after version 2....
    2023-12-14 23:00:02 UTC
  • 8.15. Scala method and function

    Scala has methods and functions, and there is little semantic difference between the two. The Scala method is part of ...
    2023-11-14 23:00:02 UTC
  • 8.16. Scala function call-by-name

    Scala’s interpreter has two ways to parse function parameters (function arguments): call-by-value:...
    2023-11-14 23:00:02 UTC
Principles, Technologies, and Methods of Geographic Information Systems  102

In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.