Class: FdViewshed

// 方式一：手动设置参数，传入观察点和目标点的经纬高
var params = {
  longitude: -75.59666463797832,
  latitude:  40.03841684475513,
  height: 25.818685059459646,
  targetLongitude:-75.5849542868912,
  targetLatitude:40.03841684475512,
  targetHeight:0,
};
let v = new Freedo.FdTools.FdViewshed(viewer, params);

// 方式二：手动设置参数，传入观察点、方位角(0度为正东方向，逆时针为正)及半径(单位为:米)
var params = {
  longitude: -75.59666463797832,
  latitude:  40.03841684475513,
  height: 25.818685059459646,
  direction: 90.0,
  far: 1000.0,
};
let v = new Freedo.FdTools.FdViewshed(viewer, params);

// 方式三：鼠标交互创建分析区域
let v = new Freedo.FdTools.FdViewshed(viewer);

Methods

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build()

执行视域分析

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destroy()

销毁

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update(option)

更新参数，重新分析

Parameters:

Name	Type	Description
option	Object	参数 Properties Name Type Argument Description longitude Number <optional> 观察点经度 latitude Number <optional> 观察点纬度 height Number <optional> 观察点高程 direction Number <optional> 方位角(0度为正东方向，逆时针为正) far Number <optional> 观察半径 targetLongitude Number <optional> 目标点经度 targetLatitude Number <optional> 目标点纬度 targetHeight Number <optional> 目标点高程