8. Css3

  • 8.1. CSS3 tutorial

    CSS is used to control the style and layout of web pages. CSS3 is the latest CSS standard. This tutorial introduces you ...
    2025-10-25 13:34:14 UTC
  • 8.2. CSS3 text-emphasis attribute

    CSS reference manual 8.2.1. Example ¶ Change the spacing between words so that each line is aligned: p { text-em...
    2025-10-25 13:34:13 UTC
  • 8.3. CSS3 introduction

    CSS3 is fully backward compatible, so you don’t have to change your existing design. 8.3.1. CSS3 module ¶ CSS3 is s...
    2025-10-25 13:34:13 UTC
  • 8.4. CSS3 border

    8.4.1. CSS3 border ¶ With CSS3, you can create rounded borders, add shadow boxes, and act as a border image without u...
    2025-10-25 13:34:15 UTC
  • 8.5. CSS3 fillet

    8.5.1. CSS3 fillet ¶ Use CSS3 border-radius attribute, you can fillet any element. 8.5.2. Browser support ...
    2025-10-25 13:34:12 UTC
  • 8.6. CSS3 background

    8.6.1. CSS3 background ¶ Several new background attributes are included in CSS3 to provide greater control over backg...
    2025-10-25 13:34:12 UTC
  • 8.7. CSS3 gradient

    CSS3 gradient allows you to show a smooth transition between twoor more specified colors. In the past, you had to use imag...
    2025-10-25 13:34:14 UTC
  • 8.8. CSS3 text effect

    8.8.1. CSS3 text effect ¶ Several new text features are included in CSS3. In this chapter, you will learn about the...
    2025-10-25 13:34:12 UTC
  • 8.9. CSS3 font

    8.9.1. CSS3 @ font-face Rule ¶ With previous versions of CSS, web designers had to use fonts that were already ins...
    2025-10-25 13:34:14 UTC
  • 8.10. CSS3 2D conversion

    8.10.1. CSS3 conversion ¶ CSS3 transformations can move, scale, rotate, lengthen, or stretch elements. 8.10...
    2025-10-25 13:34:13 UTC
  • 8.11. CSS3 3D conversion

    8.11.1. 3D conversion ¶ CSS3 allows you to use 3D transformations to format elements. In this chapter, you will lea...
    2025-10-25 13:34:12 UTC
  • 8.12. CSS3 transition

    8.12.1. CSS3 transition ¶ In CSS3, we don’t need to use Flash animation or JavaScript when we can switch from one sty...
    2025-10-25 13:34:15 UTC
  • 8.13. CSS3 animation

    8.13.1. CSS3 animation ¶ CSS3 can create animations, which can replace many web animated images, Flash animations, an...
    2025-10-25 13:34:13 UTC
  • 8.14. CSS3 multi-column

    CSS3 can design text content in a multi-column layout like a newspaper, as shown in the following example: This website in...
    2025-10-25 13:34:15 UTC
  • 8.15. CSS3 user interface

    8.15.1. CSS3 user interface ¶ In CSS3, some new user interface features have been added to resize elements, boxes, an...
    2025-10-25 13:34:13 UTC
  • 8.16. CSS Picture

    This section will show you how to use CSS to lay out pictures. 8.16.1. Rounded corner picture ¶ Example Fillet pi...
    2025-10-25 13:34:15 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。