[OpenLayers-Users] change layer style on zooming

[Phil Scadden]

On 11/11/2012 12:33 a.m., Gery wrote:
> one of the nicer things I noticed in your website is that after placing the
> cursor in google satellite the depth (ocean or land) appears with the
> lon/lat position, that one is done with WFS queries?
That is done via google api (Google elevation service). 
OpenLayers.Handler.Hover created on the map, and then a callback added 
to "pause" which calls the elevation service. Use var lonLat = 
this.map.getLonLatFromPixel(e.xy); to get an xy location and if 
necessary, transform it to lat/long.

I am however also using WMSgetFeatureInfo to retrieve height info from 
grids (eg subsurface geology) which would be another way to implement it.

Notice: This email and any attachments are confidential. If received in error please destroy and immediately notify us. Do not copy or disclose the contents.