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

Tim Sutton lists at linfiniti.com
Fri Jul 20 12:49:52 PDT 2012 

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. 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

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
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>>>> Skype: timlinux
>>>> Irc: timlinux on #qgis at freenode.net
>>>> ==============================================
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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
==============================================

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