[Qgis-developer] Plugin GdalTools - Build Virtual Raster (catalog) idea to develop

[Giuseppe Sucameli]

Hi Germán,

2010/11/24 Germán Carrillo <carrillo.german at gmail.com>

> I think you may reuse some code of the Load Them All Plugin [1] to
> accomplish this.
>
what did you mean writing "to accomplish this", to load the layers or
maybe to do a recursive scan?

Cheers.


> Regards,
>
> Germán
>
> -------------------
> [1]
> http://geotux.tuxfamily.org/index.php?option=com_myblog&task=view&id=264&Itemid=59&lang=en
>
> 2010/11/24 Giuseppe Sucameli <sucameli at faunalia.it>
>
>>  Hi Santiago,
>>
>> On Wed, Nov 24, 2010 at 6:01 PM, Santiago Lastra <
>> santiago.lastra at gmail.com> wrote:
>>
>>> Recently I've found this very interesting and useful tool, at least for
>>> me. I will propose two ways to improve the tool:
>>> - The tool right now offers the user the possibility to select as many
>>> files as he wants inside a directory. I propose to give also the possibility
>>> to define only a directory that contains raster files (of every kind), with
>>> a check box to give the oportunity to follow the subdirectories of the first
>>> one.
>>>
>> there's an opened ticket yet, see [1] ;)
>>
>>  - I think it's better to explain my problem and I think you will
>>> understand the reason of my second proposal. I have directories with up to
>>> 2000 raster files or even more. If you try the tool as is and if you select
>>> "add to canvas", it takes several minutes to load and see the virtual raster
>>> catalog (VRT) into QGIS, but if I zoom in to the right scale QGIS move the
>>> images very quickly. What I suggest is to add in the dialog the possibility
>>> to define the "scale dependent visibility" when the VRT is added to the TOC
>>> of QGIS.
>>>
>> Why don't you stop the rendering? So you can set the "scale dependent
>> visibility"
>> range using the existent layer properties dialog.
>>
>> Simply you can disable it either before you add the layer or while QGis
>> loads it.
>> Or maybe did I misunderstand?
>>
>> Cheers.
>>
>> [1] https://trac.osgeo.org/qgis/ticket/3095
>>
>>
>> --
>> Giuseppe Sucameli
>>
>>
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>>
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-- 
Giuseppe Sucameli
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