1.6. SVG <circle>

发布时间 :2023-12-05 23:00:03 UTC      

1.6.1. SVG circle- <circle>

<circle> The label can be used to create a circle:

Here is the SVG code:

Example

<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
  <circle cx="100" cy="50" r="40" stroke="black"
  stroke-width="2" fill="red"/>
</svg>

For Opera users: view the SVG file (right-click the SVG drawing preview source).

Code parsing:

  • cx and cy property defines the x and y coordinates of the dot. If omitted cx and cy the center of the circle will be set to (0,0)

  • The r attribute defines the radius of the circle

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.