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

Fri Jul 20 13:07:46 PDT 2012

On Fri, Jul 20, 2012 at 4:49 PM, Tim Sutton <lists at linfiniti.com> wrote:
> Hi
>
> On Fri, Jul 20, 2012 at 5:46 PM, Etienne Tourigny
> <etourigny.dev at gmail.com> wrote:
>> 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.
>>
>
> IMHO using tabs would be a bad idea as it would limit where we can use
> it - if we want to embed the widget in another widget we could have a
> situation of tabs in tabs which is a HIG no-no. Also have a look at
> Guiseppe's dialogs in the gdal tools they provide a simple table for
> the Key value pairs.

Of course you are right - let's go forward and see how it integrates
later on. I was referring to those dialogs about the key/value pairs
UI.

>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.

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.
>>>>>
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>
>
>
> --
> 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
> ==============================================