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

Anton Chernov chernov.anton.mail at gmail.com
Tue May 29 12:08:43 UTC 2012

Hello Torsten,

I'm excited about Edit Placemark functionalty in video.

But I'm not clean understand which part of Marble have I compile to
get it works?

When I trying to add osmannotate plugin in current Marble master build
tree the build process is broken on:

fatal error: PointScreenGraphicsItem.h:No such file

I also need some kind of Edit Placemark functionality and now I'm
trying to implement it in my own render plugin.

Thank you and best wishes,

Anton Chernov
Skype: chernov.anton
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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