[Qgis-user] Selecting rasters with vector layer

[Asher Kamiraze]

Thanks Eric, sounds really good. Is there a way to save the resulting file
(clipped) as an ECW file? I need to process it later with a 3rd party
software.

Regards


2014-03-03 23:26 GMT+01:00 Eric Goddard <egoddard1010 at gmail.com>:

> Hi asher, if you go to raster -> miscellaneous, there is a menu entry
> called build virtual raster catalog. You can use that to virtually mosaic
> all of your ECW files. This tool creates a new file you can load in as a
> raster that references all of the individual ECW files to display them
> seamlessly in qgis without having to spend the time to actually mosaic all
> of them together. Load the resulting vrt file into qgis using add raster
> and clip the vrt to your polygon layer using raster -> extraction ->
> clipper.
>
> Eric
> On Mar 3, 2014 3:53 PM, "Asher Kamiraze" <asher.kamiraze at gmail.com> wrote:
>
>> Hi all,
>>
>> I have a set of more than 200 ecw rasters that I can easily load in QGIS.
>> I also have a vector polygon layer which bounds an area covering a part of
>> the area covered by the whole set of rasters. What I would like to do is to
>> extract only, the raster which are intersected by the vector boundary. As a
>> final goal, I would like to only mosaic thoses images. I did not found a
>> way to easily do this in QGIS. Any idea on how to achieve this?
>>
>> As a workaround, I have opened only the raster intersecting the vector,
>> and would like to mosaic them. However, it does not seem to be a function
>> in QGIS ready to mosaic all opened (or selected) rasters. Any idea on how
>> to automate the process?
>>
>> Hope you could help
>>
>> Regards
>>
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>
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