<div dir="ltr"><div><div><div><div>Hi,<br><br></div>This is a great idea. <br></div>We could use this framework to add layers based on web services. For example a web service returning a GeoJSON based on some parameters + canvas extent. The idea would be to have an option to download only once, or to download for each canvas refresh (zoom out, pan, etc.) ? I would love to have the latter (with the possibility to cache features already downloaded once)<br><br></div>Regards<br></div>Michaël<br></div><div class="gmail_extra"><br><div class="gmail_quote">2015-11-19 20:03 GMT+01:00 Tom Kralidis <span dir="ltr"><<a href="mailto:tomkralidis@gmail.com" target="_blank">tomkralidis@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">One option is to have metadata records which clearly articulate direct<br>
/ actionable download links and make these metadata available via CSW.<br>
<br>
Then, using MetaSearch, one can query a given CSW, get the metadata<br>
back, display the links and download the data.<br>
<br>
There's an existing ticket open in MetaSearch discussing this functionality [1].<br>
<br>
I would recommend this as a standards-based option. Assuming data<br>
links are documented properly in metadata available via CSW, the rest<br>
just works. MetaSearch would need to be extended to action a download<br>
link to download to disk, load, and son on.<br>
<br>
..Tom<br>
<br>
[1] <a href="https://hub.qgis.org/issues/11733" rel="noreferrer" target="_blank">https://hub.qgis.org/issues/11733</a><br>
<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
On Thu, Nov 19, 2015 at 12:31 PM, Alex M <<a href="mailto:tech_dev@wildintellect.com">tech_dev@wildintellect.com</a>> wrote:<br>
> Short summary, after brief discussion about if there was a plugin to<br>
> pull SRTM (DEM) data for the canvas (which we never found), we turned to<br>
> discussing the possibility of build a framework for public data<br>
> downloading by canvas extent.<br>
><br>
> We want to avoid duplication of the same common core functionality, and<br>
> make it easy to plug new data in, and for users to be able to find what<br>
> they're looking for.<br>
><br>
> Ideally to me this is just an improvement to CSW, WCS and WFS. However<br>
> many such data sets don't exist under services, and are just file based<br>
> downloads.<br>
><br>
> This email is to gauge interest in co-developing such an option in QGIS.<br>
><br>
> Ideas welcome and encouraged.<br>
><br>
> Thanks,<br>
> Alex<br>
><br>
><br>
> -------- Forwarded Message --------<br>
> Subject: Re: [Qgis-user] SRTM-plug-in?<br>
> Date: Thu, 19 Nov 2015 09:25:16 -0800<br>
> From: Alex M <<a href="mailto:tech_dev@wildintellect.com">tech_dev@wildintellect.com</a>><br>
> Reply-To: <a href="mailto:tech@wildintellect.com">tech@wildintellect.com</a><br>
> To: Paolo Cavallini <<a href="mailto:cavallini@faunalia.it">cavallini@faunalia.it</a>>, <a href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a><br>
><br>
> On 11/18/2015 10:21 PM, Paolo Cavallini wrote:<br>
>> Il 18/11/2015 19:44, Alex M ha scritto:<br>
>>> On 11/18/2015 06:14 AM, Bernd Vogelgesang wrote:<br>
>>>> Hi,<br>
>>>> there once was a plug-in in the repository, that downloaded SRTM-DEM<br>
>><br>
>>> Did the plugin do 30m or 90m SRTM?<br>
>><br>
>> Hi all,<br>
>> agreed, it would be good to have it back. BTW, there is a growing number<br>
>> of plugins dowloading data (e.g. from NASA, from FAO, etc.). it would be<br>
>> good to have a general framework where a single service could be plugged<br>
>> in, instead of developing over and over very similar stuff.<br>
>> Any interested dev?<br>
>> All the best.<br>
>><br>
><br>
> A framework for the common parts would be nice, or an easily clone-able<br>
> basic plugin that just needs a specialized function to each service.<br>
><br>
> Of course, this is kind of the point of CSW, WCS and WFS standards. And<br>
> we really should encourage the use of standards.<br>
><br>
> This idea is similar to the getData function of the Raster package in R:<br>
> <a href="http://www.rdocumentation.org/packages/raster/functions/getData" rel="noreferrer" target="_blank">http://www.rdocumentation.org/packages/raster/functions/getData</a><br>
><br>
> Which does include the 90m SRTM already processed (CGIAR version<br>
> <a href="http://srtm.csi.cgiar.org/" rel="noreferrer" target="_blank">http://srtm.csi.cgiar.org/</a>)<br>
><br>
> I'd be interested in moving this discussion to the developer list and<br>
> participating. I'm involved with the management of the data for the<br>
> above mentioned R function.<br>
><br>
> Thanks,<br>
> Alex<br>
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