13. Sass

  • 13.2. Sass installation

    In this chapter we mainly introduce the installation and use of Sass. 13.2.1. NPM installation ¶ We can use it. n...
    2025-10-25 13:32:21 UTC
  • 13.3. Sass variable

    Variables are used to store some information and can be reused. Sass variables can store the following information: ...
    2025-10-25 13:32:21 UTC
  • 13.5. Sass @ import

    Sass can help us reduce repetitive code in CSS and save development time. We can install different properties to create so...
    2025-10-25 13:32:22 UTC
  • 13.6. Sass @ mixin and @ include

    @mixin directive allows us to define a style that can be reused throughout the stylesheet. @include directive can ...
    2025-10-25 13:32:21 UTC
  • 13.7. Sass @ extend and inheritance

    @extend instruction tells Sass that the style of one selector is inherited from another selector. If one style is almo...
    2025-10-25 13:32:21 UTC
  • 13.8. Sass function

    Sass defines various types of functions that we can call directly through the CSS statement. Serial number Fun...
    2025-10-25 13:32:21 UTC
  • 13.12. Sass Map function

    Sass Map (mapping) objects are one or more pairs key/value to show. Sass Map is immutable, so it is processing Map ...
    2025-10-25 13:32:21 UTC
  • 13.13. Sass selector function

    The Sass selector function is used to view and process selectors. The following table lists the selector functions for Sas...
    2025-10-25 13:32:21 UTC
  • 13.14. Sass Introspection function

    Sass Introspection functions are rarely used to build stylesheets and are generally used for code debugging. The follo...
    2025-10-25 13:32:21 UTC
  • 13.1. Sass tutorial

    Sass (English full name: Syntactically Awesome Stylesheets) is a cascading stylesheet language originally designed by Ham...
    2025-10-25 13:35:45 UTC
  • 13.4. Sass nesting rules and attributes

    Sass nested CSS selectors are similar to HTML’s nesting rules. As follows, we nest the style of a navigation bar: ...
    2025-10-25 13:35:46 UTC
  • 13.9. Sass String function

    Sass String the (string) function is used to process strings and get relevant information. The starting index value of...
    2025-10-25 13:35:45 UTC
  • 13.10. Sass digital function

    The Sass numeric function is used to process some numeric values. The following table lists the numeric functions of Sass:...
    2025-10-25 13:35:45 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, and so o...
    2025-10-25 13:35:45 UTC
  • 13.15. Sass color function

    The Sass color function can be divided into three parts: color setting, color acquisition and color operation. The followi...
    2025-10-25 13:35:45 UTC
《地理信息系统原理、技术与方法》  97

最近几年来,地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持,如城市管理、区划、环境整治等等,地理信息成为信息时代重要的组成部分之一; “数字地球”概念的提出,更进一步推动了作为其技术支撑的GIS的发展。 与此同时,一些学者致力于相关的理论研究,如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面,并且这两个方面构成了相互促进的发展过程。