[Qgis-user] reload WMS raster

[Alex Mandel]

Tile size is size in pixels of each image request. If you split a WMS
request into parts, they can often be rendered, and downloaded separate
in parallel from the backend web server. Note most WMTS, TMS and other
tile services use a standard of 256x256. So you are saving time on the
server side which is often the biggest time consumer in a WMS request.

This in principal is why Tile Services are faster than WMS - the image
generation is done ahead of the request by a previous request, so it
comes from cache instead of being drawn from scratch.

Thanks,
Alex

On 12/14/2014 10:37 AM, Jake Maier wrote:
> Thank you Nicolas. I turned on the cash and this is already what I want to achive. But even better is the 300x300 tile size. Now if you or someone could explain what the 300x300 means. Is it meter, or pixels, or something totally different.
> 
> Great. My problem is solved. I could bite my butt that I didn’t ask earlier  J
> Jake 
> 
>  
> 
> From: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf Of Nicolas Cadieux
> Sent: Sunday, December 14, 2014 12:58 AM
> To: qgis-user at lists.osgeo.org
> Subject: Re: [Qgis-user] reload WMS raster
> 
>  
> 
> Hi, 
> 
> Specify a tile size like 300x300 in the wms setting.  In your network option(Setting\options\network), you are able to increase the size of the cashe.  I know the first option works, the second option not sure but I do it anyway...  
> 
> Use "cache to speed up" in the rendering options.(setting\option\rendering). 
> 
> Also, I usually have 2 wms layers at once.  One with more layers (Slow), and one with only one layer like the road or water (fast).  I keep only the second one on. When I am where I want to be, I turn on the first, more complex layer. 
> 
> Nicolas Cadieux M.Sc. 
> Les Entreprises Archéotec inc.  
> 8548, rue Saint-Denis Montréal H2P 2H2 
> Téléphone: 514.381.5112  Fax: 514.381.4995 
> 
> Le 2014-12-13 19:34, "Jake Maier [via OSGeo.org]" <[hidden email]> a écrit : 
> 
> 
>>
>> I mostly work with WMS raster files. Each time I change anything, turning on or off layers, editing layers etc, the WMS reloads the raster even if there is no change in the underlying data of the raster. I have a slow connection and it drives me crazy to wait each time I move vertices. I often use ‘save as image’ and load the image, but I already have too many of those temporary rasters and still I find myself using sections or magnification where the rasters I copied are insufficient. Is there a trick to speed up the process of editing the canvas without the WMS reloading? 
>>
>> Thanks for any help 
>>
>> Jake 
>>
>>   
>>
>>
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