Size

sizeMethod used to set the size of point layer graphics.

IPointSize: number ｜[number, number] | [number, number, number]

• If the size type is number, it represents the radius of point
• The size type can be [number, number]|[number, number, number] indicating the radius and height of the column

pointLayer.size(1);
pointLayer.size([2, 10]); // The radius of the pillar is 2x2. The height is 10
pointLayer.size([2, 4, 10]); // The column radius is 2x4 and the height is 10

size(width: IPointSize)

Point layers can set the radius directly. All points in the layer use one width.

layer.size(2);

size(field: string)

The width of a point layer can be mapped based on the data values ​​accepted by the layer, accepting fields of incoming data as arguments.

layer.source([
  {
    lng: 120,
    lat: 30,
    r: 2,
  },
]);
layer.size('r');

size(field: string, domain: IPointSize[])

sizeMethod supports simple value mapping and will be based onfieldThe values ​​extracted from the data passed into the layer are mapped todomainin the value range.

layer.size('type', [1, 2, 3]);

size(field: string, callback: () => IPointSize )

sizeThe method supports the writing method of callback function, which will be based onfieldascallbackmethod parameters,callbackThe return value of the method is the actual radius of the point layer.

layer.size('type', (value) => {
  switch (value) {
    case 'path':
      return 1;
    case 'road':
      return 2;
  }
});