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
《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。