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14. Regexp

  • 14.1. Regular expressions-tutorial

    A regular expression (Regular Expression) is a text pattern that includes normal characters (for example, letters between an...
    2025-10-25 13:33:21 UTC
  • 14.2. Regular expressions-introduction

    Unless you have used regular expressions before, you may not be familiar with some terms. However, there is no doubt that yo...
    2025-10-25 13:33:22 UTC
  • 14.3. Regular expressions-syntax

    Regular expression (regular expression) describes a string matching pattern (pattern), which can be used to check whether a ...
    2025-10-25 13:33:21 UTC
  • 14.4. Regular expression-modifier (tag)

    Tags are also called modifiers, and the tags of regular expressions are used to specify additional matching strategies. Th...
    2025-10-25 13:33:21 UTC
  • 14.6. Regular expression-operator precedence

    Regular expressions are evaluated from left to right and follow the order of priority, which is very similar to arithmetic e...
    2025-10-25 13:33:22 UTC
  • 14.7. Regular expressions-matching rules

    14.7.1. Basic pattern matching ¶ It all starts with the basics. Patterns, the most basic elements of regular expressi...
    2025-10-25 13:33:21 UTC
  • 14.8. Regular expressions-exampl

    14.8.1. Simple expression ¶ The simplest form of a regular expression is to match a single ordinary character itself ...
    2025-10-25 13:33:21 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.