1. Sqlite

  • SQLite’s AUTOINCREMENT Is a keyword that automatically increments the value of a field in a table. We c...
    2025-10-25 12:31:12 UTC
  • If your site allows users to enter through a web page and inserts input into a SQLite database, you face a security pr...
    2025-10-25 12:31:10 UTC
  • Before the SQLite statement, you can use the “EXPLAIN” keyword or the “EXPLAIN QUERY PLAN” phrase to describe the deta...
    2025-10-25 12:31:14 UTC
  • VACUUM The command copies the contents of the master database to a tempdb file, then empties th...
    2025-10-25 12:31:12 UTC
  • SQLite supports the following five date and time functions: ...
    2025-10-25 12:31:14 UTC
  • SQLite has many built-in functions for dealing with string or numeric data. Here are some useful SQLite built-in funct...
    2025-10-25 12:31:10 UTC
  • 1.47.1. Installation ¶ We need to make sure that the SQLite library is ...
    2025-10-25 12:31:11 UTC
  • 1.49.1. Installation ¶ Starting with PHP 5.3.0, the SQLite3 extension i...
    2025-10-25 12:31:12 UTC
  • 1.50.1. Installation ¶ SQLite3 can be used Perl ...
    2025-10-25 12:31:17 UTC
  • 1.51.1. Installation ¶ SQLite3 can integrate with Python using the sqli...
    2025-10-25 12:31:18 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.