Difference between revisions of "GRASS Community Sprint Prague 2012"

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* fix v.in.mapgen
* fix v.in.mapgen
* improve italian translation
* improve italian translation
* Hunting bugs in the 3D raster library and implementing new bug related unit tests [http://trac.osgeo.org/grass/ticket/1662] and http://trac.osgeo.org/grass/changeset/51793
* Hunting bugs in the 3D raster library and implementing new bug related unit tests [http://trac.osgeo.org/grass/ticket/1662 ticket] and [http://trac.osgeo.org/grass/changeset/51793 r51793]
* ...
* ...
* 20:00: Dinner at restaurant [http://www.hlucna-samota.cz/ Hlučná samota], see the [http://www.openstreetmap.org/?mlat=50.071600&mlon=14.436300&zoom=18&layers=M map]
* 20:00: Dinner at restaurant [http://www.hlucna-samota.cz/ Hlučná samota], see the [http://www.openstreetmap.org/?mlat=50.071600&mlon=14.436300&zoom=18&layers=M map]

Revision as of 23:02, 28 May 2012

The GRASS GIS team will organize a GRASS Developer and Power User Meeting, aka 'GRASS Community Sprint' from May 23 to May 28, 2012. The sprint is following the FOSS4G-CEE & Geoinformatics (Free and Open Source Software for Geospatial in Central and East Europe), 21-23 May 2012, Czech Technical University in Prague, Czech Republic.

Community sprint prague2012.png

Important dates:

  • 23 (Wednesday) - 28 (Monday) May 2012: GRASS GIS Community Sprint @ FCE CTU

Grass-gis community sprint 2012 collage.jpg


This second edition of the GRASS GIS community sprint 2012 is a great occasion for folks to support the development by actively contributing to the source code, manuals or likewise. The community sprint is a get-together for GRASS project members and supporters and related OSGeo projects to make decisions and tackle larger problems. For this meeting, we welcome people committed to improving the GRASS GIS project and the interfaces to QGIS, GDAL, PostGIS, R statistics, Sextante, gvSIG, OGC Services (esp. WPS) and more. This includes developers, documenters, bug reporters, translators and others.

For this meeting, we welcome people committed to improving the GRASS GIS and related projects. This includes developers, document writers, wish and bug reporters, translators etc.


We welcome financial contributions to support the meeting and we are looking for sponsors to cover costs such as meals or to help reducing travelling and accommodation expenses for GRASS developers with far arrival If you are interested to sponsor the GRASS Community Sprint, please read about

sponsoring the GRASS project at http://grass.osgeo.org/donation.php

and, if needed, contact Markus Neteler <neteler at osgeo.org>. Any surplus at the end of the event will be turned over to the GRASS GIS project.

The first GRASS Community Sprint is a great occasion for you to support the development of GRASS. With your contribution you'll enable more developers to meet in Prague. The community sprint is an important opportunity for the GRASS developers to discuss and collaboratively resolve bugs, plan the direction for the project and work on new features. Please see below for the more detailed agenda. The developers and contributors are donating their valuable time, so it would be great if in-kind funding can be made available from within the community to cover out-of-pocket expenses. All of the work that takes place at the community sprint will be directly contributed back into the GRASS project to the benefit of everyone who uses it.

Thanks to our sponsors

We are grateful for the support which we have received to organize this GRASS Community Sprint:


When: Wednesday, May 23, 2012 (day of arrival) - Monday, May 28, 2012 (day of departure)

Of course you are invited to join or leave the community sprint whenever you want.


  • Wednesday is day of arrival
  • Thursday to Sunday
    • Full days
  • Monday is day of departure
    • Probably hacking for people with a flight later in the evening


Logo cvut.jpg

Department of Mapping and Cartography
Faculty of Civil Engineering
Czech Technical University in Prague, Czech Republic
Room B367

Location & Transportations

Prague has an international airport and is also reachable by train, bus or car.

Accommodation and Costs

Participants should plan for the following costs:

  • The participation is free of charge
  • Travel to Prague, variable depending on where you come from
  • Accommodation and meals (with the donated sponsorship money we will try to cover some expenses of the participants)

Please note: The currency in Czech Republic is crown (CZK, koruna, Kč). 100 Czech crowns are about 4 Euros (see current rates).

Accommodation in Prague

Please let us know your time of arrival and leaving, so we can book for the accommodations and organize the logistics.

Financial support: (partial) travel grants can be payed upon request thanks to our sponsors!

Weather and Common Item Prices

  • In May the weather in Prague is usually quite warm (15 or more degrees by day)
  • A espresso coffee is about 20 CZK (80 cents), a beer (half of liter) in a common pub is around 25 CZK (1 euro), can be more in special pubs. In Prague you can have a full meal (see Czech cuisine) for still 75 - 150 CZK (3 - 6 euros), but beware of tourist restaurants, the price can easily rise. It's quite easy to find in Prague also Italian or Chinese restaurants.

Agenda - What we plan to do

Note: The program is generally open for your ideas. Please write an email to the GRASS developer list to discuss your contribution.

Further details about the action items you find here and below. Topics cover non-technical, semi-technical, and technical issues.


TODO: merge below entries from Talk:GRASS_Community_Sprint_Prague_2012

Wednesday, 23 May

  • 14:30: Kick-off in the Faculty of Civil Engineering, building B, room 367 (3rd floor, map)
  • Participants presentation

List of topics:

  • various topics from the list: r.modis, add liblas support to OSGeo4W GRASS package (download)
  • extension of Rtree to 4D, time series test script portability updates, ...
  • see reports here
  • 20:00: Dinner at restaurant Budvarka near the university, see the map

Thursday, 24 May

  • 9:00-evening
  • Discuss role and current composition of GRASS-PSC
  • Seminar by Sören Gebbert: "New time series management in GRASS 7" (manual)
  • Starting work on v.in.geopaparazzi
  • Discussion: Generate automated command statistics with g.parser (just module name)
  • Discussion: adopting CMS for Web site - huge amount of work to change...
  • Discussion: GSoC project discussion about the new GRASS Python API [1] and milestones of the project
  • 20:00: Dinner at restaurant U Glaubiců in the city center, see the map

Friday, 25 May

  • 9:00-evening
  • wxGUI: save session commands into protocol
  • test wxGUI digitizer
  • visual guide to GRASS GIS usage
  • fix v.in.mapgen
  • improve italian translation
  • Hunting bugs in the 3D raster library and implementing new bug related unit tests ticket and r51793
  • ...
  • 20:00: Dinner at restaurant Hlučná samota, see the map

Saturday, 26 May

  • 9:00-evening
  • backport of wxGUI language selector (.bat file update yet missing for Windows)
  • Lidar DEM based example added to r.lake
  • Release of new v.in.geopaparazzi
  • implement saving list of executed commands in wxGUI - r51798
  • Moving the ilist functionality from the vector library to the gis library [2]
  • Implementation of correctly scaled time axes when exporting space time raster datasets as 3D raster maps representing space time voxel cubes [3]
  • 20:00: Dinner at restaurant Ztráty a nálezy, see the map

Sunday, 27 May

  • 9:00-evening
  • wxGUI about window issues - r51830
  • 19:00: Dinner at restaurant U Veverky, see the map

Monday, 28 May

  • Last meeting
  • Farewell and have a good trip home


We are planning for attendance of 20 people (i.e., hacking places) but of course you are welcome to join us and bring new ideas with you, as more places are available. Please add your name here or contact Martin Landa <landa.martin at gmail.com>:

In person

No Participant Country Arrival Departure Topic T-Shirt Notes
1 Martin Landa Czech Republic May 20 May 28 Toolbox concept, vector engine in GRASS 7, wxGUI, PostGIS Topology support L
2 Markus Neteler Italy May 20 May 28 GRASS on Android, QGIS-Sextante-GRASS interface, high performance computing, g.cloud, singing & beer in pub, Toolbox, ... M + S
3 Luca Delucchi Italy May 20 May 26 r.modis, r.li.setup gui, v.in.geopaparazzi (only if andrea antonello comes to Prague) L
4 Andrea Antonello Italy May 21/22 May 25/26 v.in.geopaparazzi, GRASS [Caesar model] input module with Silvia, singing at the pub with Luca Delucchi and Peter Loewe L
5 Silvia Franceschi Italy May 21/22 May 25/26 GRASS [Caesar model] input module S
6 Peter Loewe Germany May 20/21 May 25/26 collecting beer-money while Luca and Andrea sing in pubs ; i.atcorr debugging ; g.cloud ? ; r.tsunami ? ; Tutorial/Documentation on g.infer S
7 Anna Kratochvilova Czech Republic May 20 May 28 imagery, wxGUI S
8 Vaclav Petras Czech Republic May 20 May 28 imagery, wxGUI, Toolbox concept ? M
9 Helena Mitasova USA May 21 May 25/26 toolbox concept, student sandbox, wxnviz z-scale, inventory of mobile and touch implementations, GRASS on-line and cloud
10 Sören Gebbert Germany May 20 May 27 Temporal GIS framework demo and discussion, Temporal GIS wxGUI and WPS integration, massive parallel computation of spatio-temporal datasets, Cloud computing L
11 Štěpán Turek Czech Republic May 20 May 28 v.net.* front end, WMS L
12 Radim Blažek Czech Republic May 24/25 May 24/25 QGIS interface -
13 Pietro Zambelli Italy May 23/24 May 28/29 GSoC2012: High level map interaction L
14 Markus Metz Italy May 23 May 26 GRASS 7 everything
15 Nikos Alexandris Greece May 24 May 27/28 (wannabe) bughunter, assist documentation and tutorials
16 Milena Nowotarska Poland May 23 May 27 translation, wxGUI S
17 Massimiliano Cannata Switzerland May 20 May 24 finalization and commit of a new grass addon module r.massmov, a physically based model to simulate the landslide ruonout velocity and deposit thickness
18 Monia Molinari Switzerland May 20 May 24 finalization and commit of a new grass addon module r.massmov, a physically based model to simulate the landslide ruonout velocity and deposit thickness

Via IRC chat

#grass on Freenode

For details, see IRC

Collaborative document scratching

(Power) users from all over the world are kindly invited to assist with testing of new and existing functionality. To collect results and notes, we set up an interactive, collaborative editing tool which works in real-time:

Please check http://titanpad.com/I51nq1SrNc

Individual Preparation

  • Bring your own computer
  • Bring power connector adapter if needed (Czech Republic: 230V, 50Hz, Type C Europlugs are common and also Type E)
  • Install subversion and the compiler tools, and come with a working GRASS development environment if possible.

Broadcast & Video

During the event :)


Also during the event :)


  • How was it last year?
  • Is the GRASS Community Sprint just a coding event?
    • It is mainly a coding and documentation event. It is a working session for people who are already participants in the GRASS project and/or are committed to improving the GRASS project.
    • On demand we can do some presentations of current working GRASS implementation and new upcoming features to spread the idea of Open Source GIS software
  • Is the GRASS Community Sprint for developers only?
    • No: anybody can help, with testing, checking out bugs and fixes, documentation and more.
  • Where can I get help and more information about the community sprint?