1. SVG tutorial

SVG means scalable vector graphics.

SVG uses the XML format to define the image.

现在开始学习 SVG!

SVG instance

< html > < body > < H1 > My first SVG < / H1 > < svgxmlns= “ http://www.w3.org/2000/svg ”version=”1.1”><circlecx=”100”cy=”50”r=”40”stroke=”black”stroke-width=”2”fill=”red”/></svg></body></html>

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点击 “尝试一下” 按钮查看运行结果.

SVG instance

We can edit the SVG instance online and view the running results online!

在线实例

SVG reference manual

In the rookie tutorial, we provide you with a complete SVG reference manual that lists the elements of SVG in all W3C recommendations (SVG Version 1.1).

SVG 参考手册

SVG 在线编辑器

  • 1.1. SVG tutorial

    SVG means scalable vector graphics. SVG uses the XML format to define the image. Now start to learn ...
    2023-12-08 23:00:02 UTC
  • 1.2. SVG introduction

    SVG is a language that uses XML to describe two-dimensional graphics and drawing programs. 1.2.1. ...
    2023-12-08 23:00:02 UTC
  • 1.3. SVG instance

    1.3.1. Simple SVG instance ¶ SVG files are recommended to use ...
    2024-03-18 01:40:05 UTC
  • 1.4. SVG is on the HTML page

    SVG files can be embedded in HTML documents with the following tags: < embed ...
    2023-12-05 23:00:02 UTC
  • 1.5. SVG <rect>

    1.5.1. SVG Shapes ¶ SVG has some predefined shape elements that can be ...
    2023-12-05 23:00:03 UTC
  • 1.6. SVG <circle>

    1.6.1. SVG circle- <circle> ¶ ...
    2023-12-05 23:00:03 UTC
  • 1.7. SVG <ellipse>

    1.7.1. SVG Ellipse- <ellipse> ¶ ...
    2023-12-07 00:55:31 UTC
  • 1.8. SVG <line>

    1.8.1. SVG straight line- <line> ¶ ...
    2023-12-07 00:55:31 UTC
  • 1.9. SVG <polygon>

    1.9.1. SVG Polygon- <polygon> ¶ ...
    2023-12-07 00:55:31 UTC
  • 1.10. SVG <polyline>

    1.10.1. SVG Polyline- <polyline> ¶ ...
    2023-12-07 00:55:31 UTC
  • 1.11. SVG <path>

    1.11.1. SVG path- <path> ¶ ...
    2023-12-07 00:55:30 UTC
  • 1.12. SVG <text>

    1.12.1. SVG text- <text> ¶ ...
    2023-12-07 23:00:02 UTC
  • 1.13. SVG Stroke attribute

    1.13.1. SVG Stroke attribute ¶ SVG provides a wide range of ...
    2023-12-07 23:00:02 UTC
  • 1.14. SVG filter

    The SVG filter is used to add special effects to SVG graphics. 1.14.1. SVG filter ...
    2023-12-07 23:00:02 UTC
  • 1.15. SVG blur effect

    Note: Internet Explorer and Safari do not support SVG filters! 1.15.1. <d...
    2023-12-07 23:00:02 UTC
  • 1.16. SVG Shadow

    Note: Internet Explorer and Safari do not support SVG filters! 1.16.1. <d...
    2023-12-07 23:00:02 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.