将Google地图的单个大型图片叠加转换为图块 [英] Convert a single large image overlay to tiles for Google Maps

问题描述

我有一张使用Google Maps v3 API覆盖的大型高分辨率图片。这对于具有合理网络连接的台式机和笔记本电脑来说效果很好，但毫不奇怪，它对移动用户来说效果不佳。

什么是最好的/最简单的方法来打破在各种缩放级别将图像上传到2D图块中，以便我可以通过API作为谷歌地图的平铺服务器？

有没有一个程序能够可靠地为我生成拼贴，并为我提供每个生成的拼贴的必要缩放比例和坐标，并且/或者给我正确的拼贴，如果我提供缩放和坐标？

一旦你收集到正确的信息，写一个磁贴服务器就可以轻松地完成它了吗？也许有源代码可以用作模型？ （我在 http://blog.gmapify.fr/a-map-tile-server-part-2-understanding-google-maps-tile-overlays-and-building-up-a-tile-server 这当然是有帮助的，但它不会从源图像中提供图块，所以我不得不至少将这部分视为...）

<或者也许有一步一步的算法，我可以手动跟踪，如果更直接？ （因为它只有一个图像，并且它覆盖了地图上的一个区域，可能是一平方英里，所以手动这样做也许是可行的，如果不是更好的话。）

解决方案

您可以查看MapTiler http://code.google.com/p/ maptiler / 。它可以生成你需要的瓷砖。

Tile服务器非常易于编写。最简单的方法是将静态文件（您的图块）存放在目录结构中。目录结构通常是servername / zoom / x / y.png（或zoom / y / x.png）。这种结构也是由MapTiler生成的。 MapTiler还使用这些图块生成示例网页（但我想它使用的是Google Maps API v2）。

有关在Google Maps API v3中使用图块的信息，可以找到此处： http://code.google.com/apis/maps /documentation/javascript/maptypes.html#CustomMapTypese

I have a large high-resolution image that I am using for an overlay using Google Maps v3 API. This works fine for desktop and laptop computers with a reasonable network connection, but unsurprisingly it does not work so well for mobile users.

What's the best/easiest way to break the image up into 2D tiles at the various zoom levels so I can act as a tile server for Google Maps via the API?

Is there a program that will reliably generate the tiles for me and provide me with the necessary zoom and coordinates for each resulting tile and/or give me the correct tile if I provide the zoom and coordinates?

Is it pretty easy to write a tile server to do it on the fly once you gather the right info? Perhaps there's source code out there that I can use as a model? (I found a tile server at http://blog.gmapify.fr/a-map-tile-server-part-2-understanding-google-maps-tile-overlays-and-building-up-a-tile-server which is certainly helpful, but it doesn't serve tiles from a source image, so I'd have to at least figure that part out...)

Or perhaps there is step-by-step algorithm that I can manually follow if that's more straightforward? (Since it's only one image and it covers an area on the map of maybe a square mile, manually doing it like that is perhaps feasible if not preferable.)

解决方案

you can check MapTiler http://code.google.com/p/maptiler/. It can generate the tiles you need.

Tile server is really easy to write. The easiest way is just to host static files (your tiles) in a directory structure. The directory structure is then usually servername/zoom/x/y.png (or zoom/y/x.png). Such structure is also produced by MapTiler. MapTiler also generates an example web page using the tiles (but I guess it uses Google Maps API v2).

Information about using your tiles in Google Maps API v3 can be found here: http://code.google.com/apis/maps/documentation/javascript/maptypes.html#CustomMapTypese

这篇关于将Google地图的单个大型图片叠加转换为图块的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！