Size

sizeMethod used to set the height of the Polygon

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

• The size type is number, which represents the height of the Polygon.

pointLayer.size(1);

size(width: IPointSize)

The radius can be set directly on the polygon layer. All points in the layer use a height.

layer.size(2);

size(field: string)

The height of a polygon layer can be mapped based on the data values ​​accepted by the layer, accepting fields of incoming data as parameters.

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 height of the polygon layer.

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