Question

我正在使用“安星”网上通话部分,以显示“幻灯”的谷歌地图。为了显示POI,我正在使用Javaendans google.maps.Marker。

问题是,当所有350个信使在地图上显示时,它们使网上电文变得缓慢而且几乎无法使用......

如何优化?

Is there any API that e.g. puts together the map zoom level with the number of marks displayed? For example if the the zoom level is 0, e.g. 10 POIs is shown and when the zoom level is 10, all which can fit the view port are displayed...

Thanks for help Regards, Petr

Answer 1

地图上的标识太多是一个众所周知的问题。这方面有若干解决办法。可在http://code.google.com/apis/maps/articles/toomanymarkers.html> rel=“nofollow”>here 查询。

If I sum it up shortly, then the solutions are:

Clustering: It groups markers such that there are not too many markers visible on the map at one time. If you zoom in, the clusters splits into smaller clusters and/or single markers. You can either create your own marker clusterer or use some library that provides the required functionality. Great solution can be found in Google Maps utility library.
Marker manager: Marker manager allows you to specify what markers are visible at different zoom levels. Again you can create you own implementation or use a library. Google Maps utility library provides good MarkerManager.
Viewport managment: The idea is to show only the markers that are necessary to be shown (those that are located in the current viewport). While it doesn t solve the problems completely, it s a good improvement of the previous techniques.
Fusion Tables: When you use Fusion tables, the markers are rendered on Google servers in a special layer.

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