通过旋转可视化数据

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
const rotationRenderer = {
  type: "simple", // autocasts as new SimpleRenderer()
  symbol: {
    type: "simple-marker", // autocasts as new SimpleMarkerSymbol()
    // use an SVG path to create an arrow shape
    path: "M14.5,29 23.5,0 14.5,9 5.5,0z",
    color: "#ffff00",
    outline: {
      color: [0, 0, 0, 0.7],
      width: 0.5
    },
    // since the arrow points down, you can set the angle to 180
    // to force it to point up (0 degrees North) by default
    angle: 180,
    size: 15
  },
  visualVariables: [
    {
      type: "rotation", // indicates that symbols should be rotated based on value in field
      field: "grid_code", // field containing aspect values
      rotationType: "geographic"
    }
  ]
};