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

Fri Jul 20 22:10:01 PDT 2012

>It should support any GDAL raster driver that supports write and that
>is useable with the active dataset.

It would be good to dynamically query the available raster providers for 
writeable formats. Even if currently only gdal provider has write 
capabilities, there may be more in future (probably GRASS provider?).

Regards,
Marco

On 20.07.2012 22:15, Tim Sutton wrote:
> Hi
>
> On Fri, Jul 20, 2012 at 10:13 PM, Etienne Tourigny
> <etourigny.dev at gmail.com> wrote:
>> Ok this is a more general question then - which format(s) should
>> raster export support?
>>
> It should support any GDAL raster driver that supports write and that
> is useable with the active dataset.
>
> I was referring to tif only in terms of the default profiles I mentioned.
>
> Regards
>
> Tim
>
>> Etienne
>>
>> On Fri, Jul 20, 2012 at 5:11 PM, Tim Sutton <lists at linfiniti.com> wrote:
>>> Hi
>>>
>>> On Fri, Jul 20, 2012 at 10:07 PM, Etienne Tourigny
>>> <etourigny.dev at gmail.com> wrote:
>>>
>>>>> One thing that would be really nice is to have
>>>>> some default profiles:
>>>>>
>>>>> - options for maximum read performance regardless of disk space
>>>>> - options for minumum file size regardless of performance
>>>>> - options for 'middle of the road' between the above two
>>>> would you have these options for all file types? it could get a little
>>>> complex, but worth the effort. For now I am implementing 1 default for
>>>> each driver, which can be defined by the user.
>>>>
>>> I was thinking just for tiff as I think it is the most generically used.
>>>
>>> Regards
>>>
>>> Tim
>>>
>>>> Etienne
>>>>
>>>>> Regards
>>>>>
>>>>> Tim
>>>>>
>>>>>
>>>>>>> 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
>>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Qgis-developer mailing list
>>>>>>>>>> Qgis-developer at lists.osgeo.org
>>>>>>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
>>>>>>>>> ==============================================
>>>>>>>>> Please do not email me off-list with technical
>>>>>>>>> support questions. Using the lists will gain
>>>>>>>>> more exposure for your issues and the knowledge
>>>>>>>>> surrounding your issue will be shared with all.
>>>>>>>>>
>>>>>>>>> Visit http://linfiniti.com to find out about:
>>>>>>>>>   * QGIS programming and support services
>>>>>>>>>   * Mapserver and PostGIS based hosting plans
>>>>>>>>>   * FOSS Consulting Services
>>>>>>>>> Skype: timlinux
>>>>>>>>> Irc: timlinux on #qgis at freenode.net
>>>>>>>>> ==============================================
>>>>>>>> _______________________________________________
>>>>>>>> Qgis-developer mailing list
>>>>>>>> Qgis-developer at lists.osgeo.org
>>>>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>>>>> _______________________________________________
>>>>>> Qgis-developer mailing list
>>>>>> Qgis-developer at lists.osgeo.org
>>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>>>>
>>>>>
>>>>> --
>>>>> Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
>>>>> ==============================================
>>>>> Please do not email me off-list with technical
>>>>> support questions. Using the lists will gain
>>>>> more exposure for your issues and the knowledge
>>>>> surrounding your issue will be shared with all.
>>>>>
>>>>> Visit http://linfiniti.com to find out about:
>>>>>   * QGIS programming and support services
>>>>>   * Mapserver and PostGIS based hosting plans
>>>>>   * FOSS Consulting Services
>>>>> Skype: timlinux
>>>>> Irc: timlinux on #qgis at freenode.net
>>>>> ==============================================
>>>
>>>
>>> --
>>> Tim Sutton - QGIS Project Steering Committee Member (Release  Manager)
>>> ==============================================
>>> Please do not email me off-list with technical
>>> support questions. Using the lists will gain
>>> more exposure for your issues and the knowledge
>>> surrounding your issue will be shared with all.
>>>
>>> Visit http://linfiniti.com to find out about:
>>>   * QGIS programming and support services
>>>   * Mapserver and PostGIS based hosting plans
>>>   * FOSS Consulting Services
>>> Skype: timlinux
>>> Irc: timlinux on #qgis at freenode.net
>>> ==============================================
>
>

-- 
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