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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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 SVG! 1.1.1. SVG...
    2025-10-25 13:33:32 UTC

  • 1.2. SVG introduction

    SVG is a language that uses XML to describe two-dimensional graphics and drawing programs. 1.2.1. Basic knowledge that ...
    2025-10-25 13:33:31 UTC

  • 1.4. SVG is on the HTML page

    SVG files can be embedded in HTML documents with the following tags: < embed > , or . The code for SVG c...
    2025-10-25 13:33:30 UTC

  • 1.5. SVG <rect>

    1.5.1. SVG Shapes ¶ SVG has some predefined shape elements that can be used and manipulated by developers: Rectan...
    2025-10-25 13:33:30 UTC

  • 1.6. SVG <circle>

    1.6.1. SVG circle- ¶ The label can be used to create a circle: Here is the SVG code: Example ¶ ...
    2025-10-25 13:33:31 UTC

  • 1.7. SVG <ellipse>

    1.7.1. SVG Ellipse- ¶ Example 1 ¶ Element is used to create an ellipse: An ellipse is very similar t...
    2025-10-25 13:33:32 UTC

  • 1.8. SVG <line>

    1.8.1. SVG straight line- ¶ Element is used to create a straight line: Here is the SVG code: Example ...
    2025-10-25 13:33:31 UTC

  • 1.9. SVG <polygon>

    1.9.1. SVG Polygon- ¶ Example 1 ¶ Labels are used to create shapes with no less than three sides. A ...
    2025-10-25 13:33:30 UTC

  • 1.10. SVG <polyline>

    1.10.1. SVG Polyline- ¶ Example 1 ¶ Elements are used to create any shape with only straight lines: ...
    2025-10-25 13:33:31 UTC

  • 1.11. SVG <path>

    1.11.1. SVG path- ¶ Element is used to define a path. The following command can be used for path data: ...
    2025-10-25 13:33:31 UTC

  • 1.12. SVG <text>

    1.12.1. SVG text- ¶ element is used to define text. 1.12.2. Example 1 ¶ Write a text: Here is t...
    2025-10-25 13:33:32 UTC

  • 1.13. SVG Stroke attribute

    1.13.1. SVG Stroke attribute ¶ SVG provides a wide range of stroke property. In this chapter, we will look at the...
    2025-10-25 13:33:30 UTC

  • 1.14. SVG filter

    The SVG filter is used to add special effects to SVG graphics. 1.14.1. SVG filter ¶ In this tutorial, we will show ...
    2025-10-25 13:33:32 UTC

  • 1.15. SVG blur effect

    Note: Internet Explorer and Safari do not support SVG filters! 1.15.1. and ¶ All SVG filters for the Inte...
    2025-10-25 13:33:31 UTC

  • 1.16. SVG Shadow

    Note: Internet Explorer and Safari do not support SVG filters! 1.16.1. and ¶ All SVG filters for the Inte...
    2025-10-25 13:33:32 UTC

  • 1.17. SVG gradient-Linear

    1.17.1. SVG gradient ¶ A gradient is a smooth transition from one color to another. In addition, multiple color trans...
    2025-10-25 13:33:32 UTC

Principles and Applications of WebGIS

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Web框架

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WEB基础

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Principles, Technologies, and Methods of Geographic Information Systems

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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.