[Live-demo] GGL2 application for OSGeo Live

Tue Jan 3 15:00:41 EST 2012

Hello Víctor,

Great to hear about your interest in OSGeo-Live. GGL2 does sound like it 
is a good candidate, although there are a few hurdles I see before it 
would be a suitable candidate. In particular, I don't see there being 
enough time to make our 5.5 release which has a feature freeze on 7 
January 2012. I have some comments inline, but firstly a few general 
questions.

On 02/01/12 22:34, Víctor González wrote:
> Hi,
>
> I'm Víctor González and I'm currently working for the GGL2 project 
> [1]. We would like to include it into the OSGeo Live DVD, so I have 
> answered all the questions in the wiki [2] further down. Let me know 
> if there is anything else that we need to do in order to include it.
>
> Thanks in advance,
> Víctor.
>
> [1] http://www.gearscape.org
> [2] http://wiki.osgeo.org/wiki/Live_GIS_Disc_Apply
>
> ---------------------
> / * What is its name? /
> GGL2
> /* What is the home page URL?/
> http://www.gearscape.org
> /* Which OSI approved Open Source License is used? /
> GPLv3
> /* What does the application do and how does it add value to the 
> GeoSpatial stack of software? /
> The application provides a new geoprocessing language with specific 
> constructions to make geoprocessing creation more easy and reliable. 
> It can be connected to GIS applications such as gvSIG in order to get 
> the data and show the results so it interacts with some of the 
> GeoSpatial stack of software in order to add new geoprocessing 
> capabilities (fast creation and execution of custom geo-algorithms).

This sounds like it has similar capability to that offered by the Web 
Processing Service (WPS) standard.
Do GGL2 make use of the standard? If so, how?
If not, why not?
I see that this question is not in the wiki page you copied from, so 
I've just added the following line:
"Does the application make use of OGC standards? Which versions of the 
standards? Client or server? You may wish to add comments about how 
standards are used."

Also, I'm interested to understand the relationship with ETL tools like 
GeoKettle, or Business Process Execution Languages and tools like 
Bonitasoft, http://www.bonitasoft.com/ . Does GGL2 provide the same type 
of functionality as provided by GeoKettle or Bonitasoft?

> /* Which language is it written in? /
>  Java
> /* Which version of the application should be included in the next 
> OSGeo-Live release? /
> GGL2 m3 (milestone 3)
> /* What is the size of the user community?/
> We had almost 500 downloads over the last two months. However, the 
> mailing lists has been recreated a few months ago and they are not 
> really busy yet:
> http://ggl2-usuarios.1062791.n5.nabble.com
> http://ggl2-users.1062796.n5.nabble.com
> /* What is the size of your developer community? /
>  We are two active developers.
> /* Do you have a bug free, stable release? /
> Not yet. Bug fixing (http://xp-dev.com/trac/ggl2/report/1) is the next 
> step in our roadmap and we plan to do so in the next few months, but 
> the latest release (milestone 3) is not intended for production 
> scenarios.

For OSGeo-Live, we are only looking for rock-solid stable applications. 
We are wanting to demonstrate to new users that there is quality, 
production ready Open Source Software, and if a user strikes a bug or 
error then this will reflect badly on all other applications installed 
on OSGeo-Live.

It sounds like GGL2 is not ready yet, but will likely be ready in future 
releases.

> /* Please, discuss the level of testing that your project has gone 
> through. How long has the project has had mature code. /
> The application is based on the Eclipse platform, similiar to the uDig 
> approach, so we can trust on the platform stability. Apart of that, 
> the GGL2 code running on top of that platform reuses some code from 
> the previous GGL version, which was stable. Moreover, we have over 300 
> tests checking the code correction and stability.

Are the 300 tests periodically run? Maybe during the build process? Or 
using hudson or similar?

> /* Does the application have a user interface that a user can interact 
> with? /
> Yes, the user interface is inherited from the Eclipse platform.
> /* Who will act as the project's liaison person? /
>  I will play that role.
> /* Can you please discuss how your application will be installed./
> Just like Eclipse, simply unzip the package. If gvSIG is installed, 
> unzip the plugin into the gvSIG extensions directory and we're ready 
> to go.
> /* Can the application run in 512M of RAM? /
> The minimum required memory to run the application is 128M, so yes, it 
> can. However, it will require more memory for geoprocessing. Whether 
> 512M is enough or not will depend on the geoprocess algorithm and data.
> /* How much disk space will be required to install the application and 
> a suitable example application? /
> Less than 200M.

This is quite large and we are getting very short of disk space. Are you 
including java in this 200M? (You don't need to). gvsig is already 
installed. Can you reduce disk space by bundling with gvsig?

> /* If another dataset would be more approriate, please discuss here/.
> Maybe it will be interesting to have some CSV or GPX files to work 
> with. We can include some simple sample files in our own 
> package/sample project and it will not exceed the 200M limit.

Our strong preference is to make use of existing datasets in order to 
reduce disk space, and maintenance of the data. Are you able to make use 
of existing datasets?

> /* Each OSGeo-Live application requires a Project Overview available 
> under a CC By and a Quickstart available under a CC By-SA license. 
> Will you produce this? /
>  Yes.
> /* In past releases, we have included Windows and Mac installers for 
> some applications. It is likely we won't have space for these in 
> future releases. However, if there is room, would you be wishing to 
> include Windows and Mac installers?/
> It is not necessary.
>
>
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