Sen, Marcus A. wrote:

>> -----Original Message-----
>> From: Jonathan Moules [mailto:jonathanmou...@warwickshire.gov.uk]
>> Sent: 07 November 2013 15:43

>> Thanks for your reply. WCS was one option I considered (I dabbled with
>> it a few years ago). But are there any applications out there that
>> could use it as a height-layer for draping a WMS over?
> Not sure if this is the kind of thing you are thinking of and it isn't a 
> ready-to-use end user application but at 
> http://earthserver.bgs.ac.uk/clients/3d/glasgow_geology.html you can see a 
> web client which uses the x3dom library (www.x3dom.org) and WebGL to show a 
> WMS image (the top ground surface layer) draped on a DEM retrieved from a 
> WCS. Well that isn't quite accurate; this version is getting the DEM data 
> from a rasdaman (http://www.rasdaman.org/) WCPS as that allows us to specify 
> a reduction in resolution of the source DEM for retrieval which WCS doesn't. 
> However, we have used WCS (returning data as GML coverages) as well and it 
> also works. This is using some early development code from 
> https://github.com/PHerzig/EarthServer developed for the EarthServer 
> http://earthserver.eu/ project. So this would be an option if you are happy 
> doing some web page and Javascript programming to make something suitable for 
> your own uses. It will get slow if you want to use high resolution DEMs.

WCS does support sampling to non-notive resolutions but it is almost impossible 
to know how to do it  with different WCS versions. In version 1.0 is was 
understandable for human beings and parameters were called RESX and RESY. In 
this case Mapserver documentation goes further with the details than we do and 
this is worth reading http://www.mapserver.org/ogc/wcs_server.html

-Jukka Rahkonen-

> This requires a WebGL capable browser (and graphics card). I've used Firefox 
> and Chrome, Internet Explorer 11 is supposed to be WebGL capable but I 
> haven’t tested that yet.

> Regards,

Marcus Sen
British Geological Survey
Keyworth
Nottingham
NG12 5GG
Web: http://www.bgs.ac.uk

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