首页 \ 问答 \ 这里Map Tile API：从EPSG：3857坐标中检索地图平铺地址(Here Map Tile API: Retrieve Map tile address from EPSG:3857 coordinate)

这里Map Tile API：从EPSG：3857坐标中检索地图平铺地址(Here Map Tile API: Retrieve Map tile address from EPSG:3857 coordinate)

 我必须将现有的openlayers 2应用程序的地图图块提供程序从OpenStreetMaps更改为Here maps。 为此，我尝试实现UsingCustomTiles中描述的类似方法。  
 现在我不知道如何将我的EPSG：3857坐标（边界）映射到正确的z / x / y平铺地址。 Map Tile API Developer's Guide中有一个计算示例来获取EPSG：4326坐标的正确平铺地址，我认为不需要重新投影我的坐标，因为地图和坐标是投影的mercator。  
 此外，我不确定在openlayers映射中为maxExtent和maxResolution设置什么值，也许这就是我的情况下UsingCustomTiles示例失败的原因。  
 有人可以提供一些提示吗？ 

I have to change the map tile provider of an existing openlayers 2 application from OpenStreetMaps to Here maps. To achieve that, i tried to implement a similar approach as described in UsingCustomTiles. 
Now i don't know how to map my EPSG:3857 coordinates (bounds) to the correct z/x/y tile address. There is a calculation example in the Map Tile API Developer's Guide to get the correct tile address for an EPSG:4326 coordinate and i do not think it is required to reproject my coordinates, since map and coordinates are mercator projected.  
Also i am not sure what values to set for maxExtent and maxResolution in the openlayers map, maybe that is the reason the UsingCustomTiles example failed in my case. 
Can someone please provide a hint?

原文：https://stackoverflow.com/questions/29774318

更新时间：2022-08-06 10:08

最满意答案

 这通常被称为“内联事件”，并且只是在OnSpeak事件触发时运行特定代码的另一种方式。  
x.OnSpeak += (s, e) => Console.WriteLine("On Speak!");
 
 s是sender ， e是事件参数。  
 您可以像这样重写代码，这可能更熟悉：  
x.OnSpeak += OnSpeakEvent;

private static void OnSpeakEvent(object s, CancelEventArgs e)
{
    Console.WriteLine("On Speak!");
}

This is often referred to as an "inline event", and is just another way of running particular code when the OnSpeak event fires. 
x.OnSpeak += (s, e) => Console.WriteLine("On Speak!");
 
The s is the sender, and the e is the event arguments. 
You could rewrite your code like this, which may be more familiar-looking: 
x.OnSpeak += OnSpeakEvent;

private static void OnSpeakEvent(object s, CancelEventArgs e)
{
    Console.WriteLine("On Speak!");
}

这里Map Tile API：从EPSG：3857坐标中检索地图平铺地址(Here Map Tile API: Retrieve Map tile address from EPSG:3857 coordinate)

最满意答案

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