[Marble-devel] Questions About Marble Installation

[Torsten Rahn]

Hi Paul,

On Thursday 22 April 2010 22:43:50 Paul Carlisle wrote:
>    svn://anonsvn.kde.org/home/kde/trunk/KDE/kdeedu/marble
> but I don't see any tags other than the KDE 0.8 version.

Indeed we haven't got a Marble specific 0.9 tag.

But you can get the Marble 0.9 branch by checking out:

svn co svn://anonsvn.kde.org/home/kde/branches/KDE/4.4/kdeedu/marble

This is also mentioned here: :-)

http://edu.kde.org/marble/obtain.php

Regards,

Torsten
 
> On Thursday 22 April 2010 03:42:03 Torsten Rahn wrote:
> > Hi Paul,
> > 
> > On Wednesday 21 April 2010 23:34:41 Paul Carlisle wrote:
> > > We will very likely be using Marble for an upcoming project that
> > > requires the display of a user's position on a map. Resolution will
> > > never have to be very high - at the finest, we probably won't have to
> > > show an area any smaller than roughly 50 miles on a side. The
> > > application will be written in C++ using Qt and the MarbleWidget
> > > class, running under Unix.
> > 
> > Great :-)
> > 
> > > Unfortunately, this application will almost never have Internet access,
> > > so we will be forced to provide a large image, or our own set of image
> > > tiles.
> > 
> > Yes, that would both be possible.
> > 
> > > After playing with a simple demo program, I note that the Blue Marble
> > > dataset only seems to contain a single JPEG image that is 2700x1350
> > > pixels. This seems awfully small for the level of detail seen in the
> > > zooms. Is it drawing the data from somewhere other than the <install
> > > location>/data directory? Or is Marble just using a really good scaling
> > > algorithm?
> > 
> > Marble is fetching more tiles from the internet while you are browsing
> > the
> > 
> >  map. The data is downloaded to ~/.marble/data by default in all versions
> >  up to 0.9.x.
> > 
> > So I guess you have an internet connection running in the background
> > which downloads the data behind your back (it's possible to disable this
> > 
> >  behaviour btw., so that Marble remains in offline mode). :-)
> >  
> > > I note in your documentation that the largest image that the widget
> > > will automatically tile is 10800x5400. If we choose to download, say,
> > > the full- resolution NASA Blue Marble images and provide our own
> > > tiles, is it sufficient to simply place the tile directly tree in the
> > > data area, or are there additional steps needed to make the
> > > application locate the tiles?
> > 
> > There are no further steps necessary. :-) You can just place the
> > downloaded tiles either in the local ( ~/.marble/data ) or
> > system/install directory.
> > 
> > > Also, what is the recommended way of telling Marble where the data is
> > > stored?
> > 
> > Yes, see the third chapter at:
> > http://edu.kde.org/marble/obtain.php
> > 
> > > Is there an environment variable, or can the path be set at
> > > runtime? I'm referring to the widget, not the Marble executable.
> > 
> > Yes, see the third chapter at:
> > http://edu.kde.org/marble/obtain.php
> > 
> > You might also have a look at the documentation of the MarbleDirs class
> > for
> > 
> >  a better understanding :-)
> > 
> > Note also that this stuff has changed in trunk. For development we
> > usually recommend to use the stable Marble version (i.e. right now this
> > is 0.9.x). But if you should decide to use trunk then you need to be
> > aware of the
> > 
> >  recent changes (which Bastian could tell more about).
> >  
> > > We will
> > > likely not be given root access when we install our application and
> > > data, so we need to be able to configure Marble to look where we will
> > > be forced to install.
> > > 
> > > If this project succeeds, we may explore the possibility of building
> > > our own Open Street Map server in order to provide the follow-on level
> > > of detail some users will want.
> > 
> > That should work fine with Marble as well.
> > 
> > > For now, however, high-resolution imagery
> > > will probably be sufficient.
> > 
> > Cool,
> > 
> > Best Regards,
> > 
> > Torsten
> > 
> > > Thank you in advance for your help.
> > > _______________________________________________
> > > Marble-devel mailing list
> > > Marble-devel at kde.org
> > > https://mail.kde.org/mailman/listinfo/marble-devel
> > 
> > _______________________________________________
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> > Marble-devel at kde.org
> > https://mail.kde.org/mailman/listinfo/marble-devel
> 
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