9. Swift

  • An extension is to add new functionality to an existing class, structure, orenumerated type. An extension can...
    2023-12-08 01:10:05 UTC
  • The protocol specifies the methods and properties necessary to implement a particular function. Any type that...
    2023-12-11 00:54:58 UTC
  • Swift provides generics that allow you to write flexible and reusable functions and types. The Swift standard...
    2023-12-08 01:10:05 UTC
  • Access control can limit the level of access to your code from other source files or modules. You can explici...
    2023-12-11 00:54:58 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.