获得向下钻取效果州的最佳方法 => 国会选区

Question

我目前有一张显示美国各州多边形的地图。我会 希望能够让用户双击一个状态，然后放大 州和显示国会选区 (CD) 多边形。

我的个人地图使用 kml 效果很好。我不确定是什么 从状态向下钻取到 CD 的最佳方法。棘手的一点是我需要状态名称/代码，因为这就是我现在在 CD 级别生成 KML 的方式。

我正在使用谷歌地图 api v3。

Answer 1

也许我弄错了，但是您希望能够双击地图中的某个点并找出单击的状态？然后缩放到该状态并显示 CD 地图？

假设是这种情况 - 在 Google 地图中对双击事件执行 reverse geocode。从生成的地理数据中提取状态（结果数组中的倒数第二个数据）。

来自 Google 文档的示例响应：

results[0].formatted_address: "275-291 Bedford Ave, Brooklyn, NY 11211, USA",
results[1].formatted_address: "Williamsburg, NY, USA",
results[2].formatted_address: "New York 11211, USA",
results[3].formatted_address: "Kings, New York, USA",
results[4].formatted_address: "Brooklyn, New York, USA",
results[5].formatted_address: "New York, New York, USA",
results[6].formatted_address: "New York, USA", // The state information
results[7].formatted_address: "United States"

如果您想缩放到预定义的州地图范围，您可以定义自己的地图或使用标准地理编码来查找该州的坐标。

Answer 2

图片如下：

这是来源：

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