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This sample shows how to use the rotation visual variable to visualize wind direction measured at various weather stations around the world.

The rotation visual variable can be set directly in the renderer's constructor.

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"

Additional visualization samples and resources

Sample search results