[GRASS-dev] Try GRASS GIS online: rollApp - rollapp.com

Huidae Cho grass4u at gmail.com
Fri Dec 20 23:15:35 PST 2019

Ah! /tmp works. Thanks!

On Fri, Dec 20, 2019 at 9:35 PM Vaclav Petras <wenzeslaus at gmail.com> wrote:

> On Fri, Dec 20, 2019, 3:42 PM Huidae Cho <grass4u at gmail.com> wrote:
>> Vaclav,
>> rollApp looks good, but it's read-only without a plan. I can start the
>> GUI, but I cannot create a new location, which means no GRASS session. Is
>> there a sample location there so I can actually try it in a read-only mode?
> There is a workaround: Change GRASS database directory to /tmp. Then, you
> can download a sample location and work with it.
> Perhaps a state GRASS could detect and switch to /tmp automatically.
>> Thanks,
>> Huidae
>> On Fri, Dec 20, 2019 at 10:48 AM Vaclav Petras <wenzeslaus at gmail.com>
>> wrote:
>>> Dear all,
>>> Following posts on Binder - mybinder.org [1] and CoCalc - cocalc.com
>>> [2, 3], I would like to introduce also rollApp - rollapp.com, another
>>> alternative for "Try online" link. It is a freemium service providing
>>> access to many (mostly) open source applications through a web browser
>>> (i.e., in cloud). You need to log in (e.g., with Google Account) to access
>>> it and you can't save data without purchasing a plan, but you can run
>>> applications and access the Internet. (With a plan, you can connect
>>> different storage such as Drobox or Google Drive.)
>>> It can run GRASS GIS for couple years already. You can try it here:
>>> https://www.rollapp.com/app/grassgis (page with a Launch button)
>>> https://www.rollapp.com/launch/grassgis (direct link with possibly
>>> sub-optimal results)
>>> [1] https://lists.osgeo.org/pipermail/grass-dev/2019-August/093053.html
>>> [2] https://lists.osgeo.org/pipermail/grass-dev/2019-August/093058.html
>>> [3]
>>> https://lists.osgeo.org/pipermail/grass-dev/2019-December/093910.html
>>> Right now, it would not work well as a "try online" tool, but it could.
>>> Continue reading if you want to know details.
>>> I worked with them in the past I bit and made some fixes in GRASS GIS
>>> which helped rollApp to start GRASS GIS.
>>> https://trac.osgeo.org/grass/changeset/70461
>>> https://trac.osgeo.org/grass/changeset/70335
>>> https://trac.osgeo.org/grass/changeset/70336
>>> https://trac.osgeo.org/grass/changeset/70450
>>> https://trac.osgeo.org/grass/changeset/70357
>>> Some additional commits since then (for example, removal of tput) also
>>> improved start in environments such as rollApp.
>>> https://github.com/OSGeo/grass/commit/5c46b130ea50df148ebc73699974c2a621e15e4b
>>> One ongoing issue (which is possibly relevant to CoCalc, too) is that
>>> GRASS GIS can start only with terminal. You can reproduce the issue locally
>>> on Linux using `nohup grass` or, at least on Ubuntu with Unity, by pressing
>>> Ctrl+F2 and typing "grass".
>>> https://trac.osgeo.org/grass/ticket/3295
>>> Nevertheless, you can start GRASS GIS even with free account, in the
>>> startup screen change the database directory to /tmp, download a sample
>>> location, and start GRASS GIS. I think the GUI is little bit faster than in
>>> CoCalc. The command line is worse than what you have in CoCalc (fixed size
>>> xterm versus in-browser one).
>>> There is couple things which can be done in GRASS GIS or in rollApp to
>>> make this a great "try online" option (even perhaps as a secondary one in
>>> case we want to favor an open source platform). In any case, I would like
>>> to find a place on the new website to have rollApp listed as one option for
>>> using GRASS GIS online.
>>> Let me know what you think,
>>> Vaclav
>>> _______________________________________________
>>> grass-dev mailing list
>>> grass-dev at lists.osgeo.org
>>> https://lists.osgeo.org/mailman/listinfo/grass-dev
>> --
>> Huidae Cho, Ph.D., GISP, PE (MD), CFM, M.ASCE
>> Open Source GIS Developer, GRASS GIS Development Team

Huidae Cho, Ph.D., GISP, PE (MD), CFM, M.ASCE
Open Source GIS Developer, GRASS GIS Development Team
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