XCSoar

On 2010/09/21 14:51, Michal Jezierski <m.jezierski@...> wrote:
> I would like to play around a little with shapefiles, where do I get 
> info on what tools are needed? I've tried to use ArcGIS Explorer, but it 
> has limited capabilities for what I would like to do. What software is 
> used in the XCM maps generator? Is it possible to download sources for 
> XCM maps from somewhere (if still online)?

The terrain generator (which includes the topography generator) is in
our git repository in the directory "terraingen".  Scott Penrose
submitted its source code a few months ago, and Tobias did some work
on it.

For the real work, it looks like it calls the GDAL programs
(http://www.gdal.org/).

Max

Hi Michel,

I am currently trying to build a new terrain generator for XCSoar using 
python instead of perl. The old sources in our git repo aren't quite 
complete but most of the relevant stuff is there. My current approach is 
also (partly) available in the git repo.

To generate the topology files currently the vmap0 data set is used. The 
shapefiles are trimmed to the area of interest using the "ogr2ogr" 
utility application.
You can download the data at http://gis-lab.info/qa/vmap0-eng.html

When the new terrain gen works properly I will try to include 
OpenStreetMap data for city names and later roads, rail tracks, ...
The data for that will either come from OSM directly or from this site 
I've found: http://downloads.cloudmade.com/

For the terrain itself currently the SRTMv3 data set is used. The old 
terrain gen used the data provided by the NASA and needed some 
conversion steps before it was in the right form. My new approach is 
using already converted GeoTIFF files from this website: 
http://srtm.csi.cgiar.org/
They also fixed some zero-data areas using complex interpolation 
algorithms, that are simply zero in the NASA data set.

If you would like to help you could visit us on the freenode IRC network 
(#xcsoar).

And now to answer your question:
I've just discovered qGIS. It seems like a good tool, but I've so far 
just used it for viewing not editing.
The software used by the XCM generator is all part of the GDAL project 
as max mentioned. In particular we use these tools: ogr2ogr, 
gdal_merge.py and gdalwarp
And as I mentioned the sources of the old terrain gen (as far as 
available) are in our git repo. (By our I mean either Max's repo or 
mine. The sourceforge repo is currently quite outdated)

Turbo



Am 21.09.2010 14:51, schrieb Michal Jezierski:
> Hello,
>
> I would like to play around a little with shapefiles, where do I get
> info on what tools are needed? I've tried to use ArcGIS Explorer, but it
> has limited capabilities for what I would like to do. What software is
> used in the XCM maps generator? Is it possible to download sources for
> XCM maps from somewhere (if still online)?
>
> Best Regards,
>