8. Scala

  • 8.33. Scala tuple

    Like lists, tuples are immutable, but unlike lists, tuples can contain different types of elements. The value...
    2023-11-20 23:00:02 UTC
  • 8.34. Scala Option

    The Scala Option (option) type is used to indicate that a value is optional (with or without value). ...
    2023-11-20 23:00:02 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 no...
    2023-11-21 23:00:02 UTC
  • 8.36. Scala Iterator

    Scala Iterator is not a collection, it is a method for accessing the collection. It...
    2023-11-20 23:00:02 UTC
  • 8.37. Scala Trait

    Scala Trait (characteristic) is equivalent to the interface of Java, but it is actually more powerful than the interfa...
    2023-11-21 23:00:03 UTC
  • 8.38. Scala pattern matching

    Scala provides a powerful pattern matching mechanism and has a wide range ofapplications. A pattern match con...
    2023-11-21 23:00:02 UTC
  • 8.39. Scala regular expression

    Scala passed scala.util.matching in the bag Regex class to support...
    2023-11-22 23:00:03 UTC
  • 8.40. Scala exception handling

    Scala’s exception handling is similar to other languages such as Java. Scala’s method can terminate the execu...
    2023-11-21 23:00:02 UTC
  • 8.41. Scala extractor

    The extractor extracts the parameters that construct the object from the object passed to it. The Scala stand...
    2023-11-21 23:00:03 UTC
  • 8.42. Scala File I/O

    Scala performs file writing operations, directly using the I/O class in java ( java.io.File ...
    2023-11-21 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.