Google Maps V3, how to get array of markers/overlays?

Question

Now obviously if I was just adding them in a normal fashion I would just keep them in an array along the way but in my case the markers are being loaded in, but I am using a KML layer.

So after the KML loads and the markers show up I basically just want to know how many there are, and I can figure out some dumb hack for this (loading the KML file again with jQuery and counting it there or something), but ideally I just want something like myArray = map.getMarkers() or myArray = map.getOverlays() , does anything like that exist?

It seems such a simple task, not why it is taking me so long to find the answer. Maybe it just isn't possible?

Answer 1

没有这样的事情，您每次插入一个数组时都必须保留一个数组并添加对象ID。

Answer 2

I'm not sure if you're able to access the markers once you've added them in using a KLM layer. If you don't have that many markers, then I would say load them using the regular Marker class.

Maybe I didn't do it right, but last time I tried implementing markers using KLM layers I wasn't able to add any events to them, or access them at all.

If you only need to count them, then I would say load that same KML file using AJAX, and parse it as an XML and you can grab the elements from there to count them.

Answer 3

You can't access the markers in a KmlLayer (it is rendered as map tiles by Google's servers). You could use a FusionTableLayer (you can import KML into the FusionTable, then modify the query to that FusionTable to filter the markers) or a third party KML parser like geoxml3 or geoxml-v3 (which render the KML using native Google Maps v3 objects).

example using geoxml3

example using FusionTables