[Marble-devel] marble plugin capabilities (correct Url for the drawing video)

Wed May 30 07:09:59 UTC 2012

Hello all!

I made some work around OsmAnnotate plugin and compile it in current
marble master. Looks like OsmAnnotate was kicked out from Marble
development tree. I made backport of some functions from Marble 1.2
stable to current master. The patch is attached.

David,
To compile marble with OsmAnnotate plugin you will need to get current
master branch of Marble from git: http://edu.kde.org/marble/obtain.php
and apply the attached patch.
It's necessary to delete libOsmPlugin.so from plugins directory to
make OsmAnnotate work, because new OsmPlugin and older OsmAnnotate
register same GeoTagHandlers.

Best regards,
Anton Chernov

2012/5/29 Torsten Rahn <tackat at t-online.de>:
>
> Just a small correction regarding the annotation video:
>
> On Dienstag, 29. Mai 2012 12:14:17 Torsten Rahn wrote:
>> Hi David,
>>
>> On Dienstag, 29. Mai 2012 09:54:33 David Delbecq wrote:
>> Yes, this is possible. We had a project even inside Marble which created a
>> prototype for this kind of functionality.
>> See
>> http://www.youtube.com/watch?v=hTKc546-gjQ
>
> This wasn't the video I meant to show. The correct Url is:
>
> http://www.youtube.com/watch?v=XZt2-cj502c
>
> This shows a polygon and placemark dynamically created by the user inside
> Marble.
>
>
>> The source code for this project is located here (currently disabled from
>> compilation so it might require some minor code changes to get it compiling
>> again):
>>
>> marble/src/plugins/render/osmannotate/
>>
>> > We plan to store data in kml file, with additionnal
>> > information in a <ExtendedData> + custom xml namespace. Does marble
>> > provide a way to expose this information to our application / let our
>> > application create or edit those, or will we have to handle ourself the
>> > load / save process of our kml files?
>>
>> The Marble library provides basic support for KML loading: This includes
>> all the basic KML elements (Documents, Placemarks, Geometries, Styles,
>> ExtendedData),  - except for fancy stuff such as Animations/Tours, 3D
>> Models / COLLADA files and GroundOverlays which are not implemented yet.
>> You can check the capabilities by importing a KML file using the normal
>> Marble Virtual Globe client. If it displays your KML file fine then the
>> library will do as well.
>>
>> You can load the KML files via a single API call into Marble's model:
>>
>> http://techbase.kde.org/Projects/Marble/Runners/Parse
>>
>> Internally Marble's whole data structure is modelled after KML, so you can
>> also access the objects loaded into the model via C++ code. And you can
>> even create new ones via C++:
>>
>> http://techbase.kde.org/Projects/Marble/Runners/DisplayGeoDataPlacemark
>>
>> > - Can the component be used "off
>> > screen" for pure rendering work (generate pictures out of kml files) ? -
>>
>> Yes, this should be possible. If you just use "MarbleMap" (that is the
>> class that is used by MarbleWidget to draw the map) then everything is
>> completely "off-screen" in every kind of sense.
>>
>> > Is there a qt-jambi version of the librairy?
>>
>> There is an initial version of Qt Jambi bindings but these are certainly
>> outdated:
>>
>> http://old.qt-jambi.org/marble-map-widget-as-a-generator-example/
>> http://qt.gitorious.org/qt-jambi/old-community-
>> repo/blobs/bd785bd6117760fc862ac282dbe99bdfea01971f/examples/generator/marb
>> le/scripts/build.xml
>>
>> Getting these to work will certainly require some work. Note that most
>> developers in the Marble community use Marble's C++ framework, so the
>> existing support for bindings such as Python, Jambi, etc. is very much
>> experimental.
>>
>> > - Is there some "benchmark" application based on marble that would help
>> > us decide of computers we plan to use are fast enough to render marble
>> > datas?
>>
>> There is no benchmark suite that would cover all features of Marble.  But
>> in doubt you could try to simply install the Marble application on your
>> target system for a quick survey.
>>
>> Usually for Desktop PCs there should be no problem with performance.
>> For embedded hardware it depends:
>>
>> Marble doesn't make use of OpenGL yet. Instead it renders everything in
>> software. This has the advantage that it renders everything equally on
>> every kind of hardware that supports Qt. But this also means that on weak
>> embedded hardware running the globe projection might be heavy on your
>> hardware and might lead to relatively bad performance.
>>
>> Instead you might want to use Marble's Mercator projection which delivers
>> excellent speed for map themes that use mercator-based tile data (such as
>> OpenStreetMap, Google  Maps, Nokia Maps, etc.). If you want to target
>> embedded hardware you might want to have a look at the optimizations we do
>> for our ARM based Marble Nokia N900 packages.
>>
>> For a general overview of the features or Marble Virtual Globe (which are
>> also supported by the library) please have a look at
>>
>> http://www.slideshare.net/marbleglobe/marble-virtual-globe-13-factsheet-
>> english
>>
>> For an overview about Marble's library please have a look at:
>>
>> http://www.slideshare.net/marbleglobe/marble-for-developers-factsheet
>>
>> Finally I'd like to point out that there is community support as well as
>> commercial support available for Marble:
>>
>> http://edu.kde.org/marble/support.php
>>
>> Best Regards,
>> Torsten
>>
>> > Thank you,
>> >
>> > David Delbecq
>>
>> _______________________________________________
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>> Marble-devel at kde.org
>> https://mail.kde.org/mailman/listinfo/marble-devel
> _______________________________________________
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