6. Ruby

  • 6.34. Ruby DBI Read operation

    DBI provides several different ways to get records from a database. Hypothetical dbh is a da...
    2023-10-31 23:00:07 UTC
  • 6.35. Ruby connection Mysql-MySql2

    We introduced the use of Ruby DBI in the previous chapter. In this chapter, we use Ruby to connect Mysql to more effic...
    2023-10-31 23:00:07 UTC
  • 6.36. Ruby CGI programming

    Ruby is a general language, not only a language for WEB development, but Ruby development in WEB applications and WEB ...
    2023-11-01 23:00:07 UTC
  • 6.37. Ruby CGI method

    The following is a list of methods for the CGI class: ...
    2023-11-01 23:00:07 UTC
  • 6.38. Ruby CGI Cookie

    The HTTP protocol is stateless. But for a commercial website, it needs to maintain session information between differe...
    2023-11-01 23:00:08 UTC
  • 6.39. Ruby CGI Session

    CGI::Session Persistent session state can be saved for the user and the CGI environment, and th...
    2023-11-01 23:00:07 UTC
  • 6.40. Ruby send email-SMTP

    SMTP (Simple Mail Transfer Protocol), or simple Mail transfer Protocol, is aset of rules for sending messages from sou...
    2023-11-01 23:00:07 UTC
  • 6.42. Ruby XML, XSLT and XPath tutorials

    6.42.1. What is XML? # XML refers to Extensible markup language. ...
    2023-11-02 23:00:06 UTC
  • 6.43. Ruby Web Service Application-SOAP4R

    6.43.1. What is SOAP? # Simple object access Protocol (SOAP) is a proto...
    2023-11-02 23:00:07 UTC
  • 6.44. Ruby multithreading

    Every program running on the system is a process. Each process contains one or more threads. Thread is a sing...
    2023-11-03 23:00:06 UTC
  • 6.45. Ruby JSON

    In this section we will show you how to use the Ruby language to encode and decode JSON objects. 6...
    2023-11-02 23:00:07 UTC
  • 6.46. Ruby RubyGems

    RubyGems is a package manager for Ruby that provides a standard format for distributing Ruby programs and libraries, a...
    2023-11-03 23:00:06 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.