13. Sass

  • 13.1. Sass tutorial

    Sass (English full name: Syntactically Awesome Stylesheets) is a cascading stylesheet language originally de...
    2024-02-26 23:00:06 UTC
  • 13.2. Sass installation

    In this chapter we mainly introduce the installation and use of Sass. 13.2.1. NPM install...
    2024-02-27 23:00:06 UTC
  • 13.3. Sass variable

    Variables are used to store some information and can be reused. Sass variables can sto...
    2024-02-28 23:00:07 UTC
  • 13.4. Sass nesting rules and attributes

    Sass nested CSS selectors are similar to HTML’s nesting rules. As follows, we nest the...
    2024-02-27 23:00:06 UTC
  • 13.5. Sass @ import

    Sass can help us reduce repetitive code in CSS and save development time. We can install different properties...
    2024-02-28 23:00:07 UTC
  • 13.6. Sass @ mixin and @ include

    @mixin directive allows us to define a style that can be reused throughout the stylesheet. ...
    2024-02-28 23:00:06 UTC
  • 13.7. Sass @ extend and inheritance

    @extend instruction tells Sass that the style of one selector is inherited from another selecto...
    2024-02-28 23:00:06 UTC
  • 13.8. Sass function

    Sass defines various types of functions that we can call directly through the CSS statement. ...
    2024-02-28 23:00:06 UTC
  • 13.10. Sass digital function

    The Sass numeric function is used to process some numeric values. The following table lists the numeric funct...
    2024-02-28 23:00:06 UTC
  • 13.11. Sass list function

    The Sass list (List) function is used to process lists, access values in lists, add elements to lists, merge lists, an...
    2024-02-29 23:00:06 UTC
  • 13.12. Sass Map function

    Sass Map (mapping) objects are one or more pairs key/value to show. Sass Map is imm...
    2024-02-29 23:00:06 UTC
  • 13.13. Sass selector function

    The Sass selector function is used to view and process selectors. The following table lists the selector func...
    2024-02-29 23:00:06 UTC
  • 13.14. Sass Introspection function

    Sass Introspection functions are rarely used to build stylesheets and are generally used for...
    2024-02-29 23:00:06 UTC
  • 13.15. Sass color function

    The Sass color function can be divided into three parts: color setting, color acquisition and color operation. ...
    2024-02-29 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.