什么是缩放比例15相当于？ [英] What is zoom level 15 equivalent to?

问题描述

由于某种原因，这似乎比我想象的要难得多。我正在使用地图显示，我已将缩放级别设置为15：

  mapController.setZoom（15）; 
  

等于距离的不同缩放级别是什么？我假设是某种日志或指数规模。如果我选择1或18作为缩放级别，那么在地图上为每个缩放级别显示的近似距离是多少？

/ div>

根据 MapController.setZoom ：

设置地图的缩放级别。该值将被限制在
1和21之间，尽管并非所有区域都有较高缩放比例
的区块。这只是直接设置缩放级别;对于
逐步缩放幻想插页式动画，请使用zoomIn（）或
zoomOut（）。

参数：zoomLevel - At zoomLevel 1，地球的赤道是
256像素长。每个连续的缩放级别都会被放大
的2倍。

返回：新缩放级别，介于1和21之间。

For some reason this seems much harder to find than I thought it would be. I am working with a map display and I have set the zoom level to 15:

mapController.setZoom(15);

What are the different zoom levels equal to in distance? I am assuming is some kind of log or exponential scale. If I choose 1 or 18 for the zoom levels, what is the approximate distance that will be displayed on the screen for each zoom level on a map?

解决方案

According to MapController.setZoom:

Sets the zoomlevel of the map. The value will be clamped to be between 1 and 21 inclusive, though not all areas have tiles at higher zoom levels. This just sets the level of the zoom directly; for a step-by-step zoom with fancy interstitial animations, use zoomIn() or zoomOut().

Parameters: zoomLevel - At zoomLevel 1, the equator of the earth is 256 pixels long. Each successive zoom level is magnified by a factor of 2.

Returns: the new zoom level, between 1 and 21 inclusive.

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