Cesium JS API
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GeocoderService

GeocoderService提供地理编码和逆地理编码服务。它可以将地址或地点名称转换为经纬度坐标(地理编码),或将经纬度坐标转换为地址或地点名称(逆地理编码)。

使用方法

要使用GeocoderService,首先需要创建一个实例:

var geocoder = new Cesium.GeocoderService();

然后,可以使用geocode方法进行地理编码。例如,可以将地址字符串传递给该方法:

var address = "北京市朝阳区朝外大街";
geocoder.geocode(address).then(function(result) {
    console.log(result);
});

geocode方法会返回一个Promise对象,该对象会在地理编码完成后返回结果。

同样,可以使用reverseGeocode方法进行逆地理编码。例如,可以将经纬度坐标传递给该方法:

var position = Cesium.Cartesian3.fromDegrees(116.4124865512, 39.9122750679);
geocoder.reverseGeocode(position).then(function(result) {
    console.log(result);
});

结果对象

geocodereverseGeocode方法返回的结果都是对象,包含以下属性:

  • displayName:字符串,表示查询的地址或地点名称。
  • destination:Cartesian3对象,表示查询结果的经纬度坐标。
  • country:字符串,表示查询结果所在的国家。
  • province:字符串,表示查询结果所在的省份。
  • city:字符串,表示查询结果所在的城市。
  • district:字符串,表示查询结果所在的区县。
  • street:字符串,表示查询结果所在的街道。
  • number:字符串,表示查询结果所在的门牌号。

如果查询结果不包含某个属性,则该属性的值为null。

设置选项

GeocoderService默认使用Cesium Ion提供的地理编码和逆地理编码服务。但也可以通过设置选项来使用其他服务。例如,可以使用高德地图提供的服务:

var options = {
    url: 'https://restapi.amap.com/v3/geocode',
    key: 'your_amap_key'
};
var geocoder = new Cesium.GeocoderService(options);

选项对象包含以下属性:

  • url:字符串,表示地理编码服务的URL。
  • key:字符串,表示访问地理编码服务的密钥(有些服务需要提供密钥,有些则不需要)。
  • language:字符串,表示查询结果的语言(如果服务支持多种语言)。默认为'en'(英语)。

许可证

GeocoderService使用Apache License 2.0许可证。详情请参阅LICENSE文件。