[Qgis-developer] Announcing raster-pipes-2 branch for testing

Etienne Tourigny etourigny.dev at gmail.com
Fri Jul 20 08:46:32 PDT 2012


On Fri, Jul 20, 2012 at 6:10 AM, Radim Blazek <radim.blazek at gmail.com> wrote:
> On Fri, Jul 20, 2012 at 12:26 AM, Etienne Tourigny
> <etourigny.dev at gmail.com> wrote:
>> Yes - I was also thinking about being able to define defaults for
>> saving rasters (default format, default compression + options per
>> format, tiles) which would be application-wide.
>>
>> And this reusable widget could be pre-populated with these options -
>> and used in core as well as python plugins.  You would create an
>> instance of this widget, given a raster layer, and then be able to
>> save it.
>> I would see this as an expandable component inside each of the
>> gdaltools dialogs.
>
> Please keep in mind that other options have to be added to the dialog:
>   * user defined null values - initially will be filled with layer
> transparency values with 100% transparency
>   * output CRS
>
> Should we use tabs?

I think we could refine that when all parts are there, but it does
make sense. I would like to eventually have a standalone widget for
the options, so it could be reused (e.g. in the GDAL tab in the user
prefs). In this case it would be grafted to the main save dialog.

>
> I have granted you write access, please work directly in raster-pipes-2.

thanks
Etienne

>
> Radim
>
>> Etienne
>>
>> On Thu, Jul 19, 2012 at 7:21 PM, Tim Sutton <lists at linfiniti.com> wrote:
>>> Hi
>>>
>>> On Fri, Jul 20, 2012 at 12:19 AM, Etienne Tourigny
>>> <etourigny.dev at gmail.com> wrote:
>>>> On Thu, Jul 19, 2012 at 4:09 PM, Marco Hugentobler
>>>> <marco.hugentobler at sourcepole.ch> wrote:
>>>>> Hi Etienne
>>>>>
>>>>> Thanks for the feedback, very much appreciated. I've fixed these issues in
>>>>> raster-pipes-2 branch now.
>>>>>
>>>>> There are still a few things missing in raster saving:
>>>>> - write colortable to output dataset
>>>>> - format specific options (e.g. compression)
>>>>> - dynamic populating of the format combo box (currently hardcoded to
>>>>> geotiff)
>>>>> - progress indication for tile based saving and possibility to cancel
>>>>
>>>> It just occurred to me that it would be a great thing to implement
>>>> this as a widget+class in QgisGui, so that it could be used elsewhere
>>>> (e.g. gdaltools, sextante).
>>>>
>>>
>>> You mean as a reusable widget like the crs selector? Yes that would be great!
>>>
>>> Regards
>>>
>>> Tim
>>>
>>>> Any way I can help?
>>>>
>>>>
>>>>>
>>>>> Regards,
>>>>> Marco
>>>>>
>>>>>
>>>>> On 18.07.2012 21:12, Etienne Tourigny wrote:
>>>>>>
>>>>>> Noticed a few issues with the save dialog
>>>>>>   1) "format" drop-down is empty
>>>>>> 2) cannot select a new file
>>>>>> 3) segfault when saving to an existing file
>>>>>> 4) It would be nice to have that action in the legend contextual menu,
>>>>>> like for vector layers.
>>>>>>
>>>>>> regards,
>>>>>> Etienne
>>>>>>
>>>>>> On Wed, Jul 18, 2012 at 3:59 PM, Etienne Tourigny
>>>>>> <etourigny.dev at gmail.com> wrote:
>>>>>>>
>>>>>>> That's great news!
>>>>>>>
>>>>>>> Concerning raster saving - will there be a mechanism for compressing
>>>>>>> files?
>>>>>>> It would be great if default compression schemes could be chosen for
>>>>>>> different file types, and an option at save time - sort of like image
>>>>>>> editors.
>>>>>>>
>>>>>>> I had trouble building it with external spatialite, could only get it
>>>>>>> to compile with cmake -DWITH_INTERNAL_SPATIALITE=TRUE - does this
>>>>>>> require a special version of spatialite?
>>>>>>>
>>>>>>> regards,
>>>>>>> Etienne
>>>>>>>
>>>>>>> On Wed, Jul 18, 2012 at 12:13 PM, Marco Hugentobler
>>>>>>> <marco.hugentobler at sourcepole.ch> wrote:
>>>>>>>>
>>>>>>>> Hi devs
>>>>>>>>
>>>>>>>> I'd like to announce the branch 'raster-pipes-2' in Radims repository
>>>>>>>> https://github.com/blazek/Quantum-GIS for testing.
>>>>>>>> Radim did a great job in refactoring the process of reading / resampling
>>>>>>>> /
>>>>>>>> reprojecting / displaying / modifying raster layers. Every step is now a
>>>>>>>> subclass of QgsRasterInterface, with the advantage that several steps
>>>>>>>> can be
>>>>>>>> chained in a QgsRasterPipe. Like that, the raster functionality is
>>>>>>>> nicely
>>>>>>>> separated into different classes and it is easy to add/remove elements
>>>>>>>> in
>>>>>>>> the pipe. The iteration over the raster parts is controlled by
>>>>>>>> QgsRasterIterator (because for high-resolution prints or analysis on
>>>>>>>> large
>>>>>>>> datasets, it is impossible to keep everything in memory at once).
>>>>>>>>
>>>>>>>> Please report any issue you find in the branch to the developer mailing
>>>>>>>> list.
>>>>>>>>
>>>>>>>> Besides the changes in code architecture, there is also a new feature in
>>>>>>>> the
>>>>>>>> raster-pipes-2 branch. It is now possible to write through
>>>>>>>> QgsRasterDataProvider (currently only supported by the gdal provider).
>>>>>>>> There
>>>>>>>> is a 'save as...' function also for rasters now (though it is not 100%
>>>>>>>> complete at the moment). There is the option to save a raster in one
>>>>>>>> file or
>>>>>>>> in tiles (the tiles are then saved in one directory and vrt / pyramides
>>>>>>>> are
>>>>>>>> automatically created. Very usefull for saving the contents of a WMS
>>>>>>>> layer).
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Marco
>>>>>>>>
>>>>>>>> --
>>>>>>>> Dr. Marco Hugentobler
>>>>>>>> Sourcepole -  Linux & Open Source Solutions
>>>>>>>> Weberstrasse 5, CH-8004 Zürich, Switzerland
>>>>>>>> marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
>>>>>>>> Technical Advisor QGIS Project Steering Committee
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Qgis-developer mailing list
>>>>>>>> Qgis-developer at lists.osgeo.org
>>>>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Dr. Marco Hugentobler
>>>>> Sourcepole -  Linux & Open Source Solutions
>>>>> Churerstrasse 22, CH-8808 Pfäffikon SZ, Switzerland
>>>>>
>>>>> marco.hugentobler at sourcepole.ch http://www.sourcepole.ch
>>>>> Technical Advisor QGIS Project Steering Committee
>>>>>
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>>>
>>>
>>>
>>> --
>>> Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
>>> ==============================================
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