8. Scala

  • 8.33. Scala tuple

    Like lists, tuples are immutable, but unlike lists, tuples can contain different types of elements. The values of tuples a...
    2025-10-25 13:35:17 UTC
  • 8.34. Scala Option

    The Scala Option (option) type is used to indicate that a value is optional (with or without value). Option[T] is a co...
    2025-10-25 13:35:12 UTC
  • 8.35. Scala classes and objects

    A class is an abstraction of an object, and an object is a concrete instanceof a class. Classes are abstract and do not take...
    2025-10-25 13:35:16 UTC
  • 8.36. Scala Iterator

    Scala Iterator is not a collection, it is a method for accessing the collection. Iterator it the two basic operati...
    2025-10-25 13:35:15 UTC
  • 8.38. Scala pattern matching

    Scala provides a powerful pattern matching mechanism and has a wide range ofapplications. A pattern match contains a serie...
    2025-10-25 13:35:12 UTC
  • 8.39. Scala regular expression

    Scala passed scala.util.matching in the bag Regex class to supportregular expressions. The following example demonst...
    2025-10-25 13:35:10 UTC
  • 8.40. Scala exception handling

    Scala’s exception handling is similar to other languages such as Java. Scala’s method can terminate the execution of the r...
    2025-10-25 13:35:16 UTC
  • 8.41. Scala extractor

    The extractor extracts the parameters that construct the object from the object passed to it. The Scala standard library c...
    2025-10-25 13:35:17 UTC
  • 8.42. Scala File I/O

    Scala performs file writing operations, directly using the I/O class in java ( java.io.File ): 8.42.1. Example # ...
    2025-10-25 13:35:14 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.