8. Css3

  • 8.17. CSS button

    In this chapter, we introduce you to the use of CSS to make buttons. Basic button style default button CSS button 8.17...
    2025-10-25 13:34:15 UTC
  • 8.18. CSS paging instance

    In this section we will show you how to create paging instances by using CSS. 8.18.1. Simple paging ¶ If your site ...
    2025-10-25 13:34:14 UTC
  • 8.19. CSS3 box size

    CSS3 box-sizing Property can be set width and height properties include padding (inner margin) and border (borde...
    2025-10-25 13:34:15 UTC
  • 8.20. CSS3 Elastic Box (Flex Box)

    Elastic box is a new layout mode of CSS3. A CSS3 resilient box (Flexible Box or flexbox) is a layout that ensures thatelem...
    2025-10-25 13:34:14 UTC
  • 8.21. CSS3 multimedia query

    8.21.1. CSS2 multimedia type ¶ @media rules are described in CSS2, and different style rules can be customized fo...
    2025-10-25 13:34:15 UTC
  • 8.22. CSS3 multimedia query instance

    In this chapter, we will show you some examples of multimedia queries. Before we begin, let’s make a list of email links. ...
    2025-10-25 13:34:13 UTC
  • 8.23. CSS3 rotation-point attribute

    8.23.1. Example ¶ Set the h1 element rotates 180 degrees (from top to bottom): h1{rotation-point:50%50%;r...
    2025-10-25 13:34:12 UTC
  • 8.24. CSS grid layout

    A grid is a set of intersecting horizontal and vertical lines that define the columns and rows of the grid. CSS provides a...
    2025-10-25 13:34:13 UTC
  • 8.25. CSS Grid Container

    8.25.1. Grid container ¶ To make HTML element into a grid container, you can set the display property is s...
    2025-10-25 13:34:14 UTC
  • 8.26. CSS grid element

    8.26.1. CSS grid element ¶ A grid container contains one or more grid elements. By default, each column and row ...
    2025-10-25 13:34:13 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。