9. Echarts

  • 9.1. ECharts tutorial

    ECharts is an open source visualization library implemented in JavaScript, covering various industry diagrams to meet a...
    2025-10-25 13:35:36 UTC
  • 9.2. ECharts installation

    9.2.1. 1.Independent version ¶ We can download echarts.min.js directly and introduce it with the < script >tag. ec...
    2025-10-25 13:35:36 UTC
  • 9.3. ECharts configuration syntax

    In this section we will introduce you to some of the configurations that useECharts to generate charts. 9.3.1. Step 1: ...
    2025-10-25 13:35:37 UTC
  • 9.4. ECharts pie chart

    We have learned to draw a simple bar chart using ECharts in the previous section, and we will draw a pie chart in this chapt...
    2025-10-25 13:35:37 UTC
  • 9.5. ECharts style setting

    ECharts can change the color, shade, size, etc., of graphic elements or textthrough style settings. 9.5.1. Color theme ...
    2025-10-25 13:35:37 UTC
  • 9.6. ECharts asynchronously loads data

    ECharts data is usually set in the setOption , if we need to load data asynchronously, we can work with tools such as jQ...
    2025-10-25 13:35:36 UTC
  • 9.7. ECharts dataset

    ECharts usage dataset manage data. dataset components are used for separate dataset declarations so that data can ...
    2025-10-25 13:35:36 UTC
  • 9.8. ECharts interaction component

    ECharts provides many interactive components: example components legend , title component title , visual mapping com...
    2025-10-25 13:35:37 UTC
  • 9.9. ECharts response type

    The ECharts chart is displayed in the DOM node (container) of the height and width specified by the user. Sometimes we wan...
    2025-10-25 13:35:36 UTC
  • 9.10. Visual Mapping of ECharts data

    To put it simply, data visualization is to display the data in the form of charts, and the professional expression is the ma...
    2025-10-25 13:35:36 UTC
  • 9.11. ECharts event handling

    In ECharts, we can call back and forth the corresponding function by listening to the user’s behavior. ECharts passed on...
    2025-10-25 13:35:37 UTC
  • 9.12. ECharts rising sun map

    The rising Sun Map (Sunburst) consists of a multi-layer ring graph. In the data structure, the inner circle is the parent no...
    2025-10-25 13:35:36 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.