In a Nutshell – Breaking Down Barriers: Building a GeoKnowledge Community with OER

Building a GeoKnowledge Community at Mimas by utilising existing technologies (DSpace and services these being Landmap and Jorum. The project is in two parts:

1) Open-up 8 courses in the Landmap Learning Zone through Creative Commons BY-NC-SA and redesigning the Learning Zone area of the Landmap website, linking through to the ELOGeo repository at Jorum.

2) Transfer the hosting of the ELOGeo repository to Jorum from University of Nottingham ensuring the sustainability of the ELOGeo project outputs. Technical solutions will be sought in developing a specific community repository site within Jorum which will be transferable to other communities that may have a similar requirement in the future.

Landmap and JorumGo discover the services involved in the project at the following URLs:
Landmap: http://www.landmap.ac.uk
Jorum: http://www.jorum.ac.uk

Database migration

Following my last post, we investigated the import/export mechanism, and discovered that the database dump from Nottingham University will be easier to import into the Postgres database at the test version of DSpace 1.7.2.

After much discussion and effort we managed to get the database dump in sql format which is around 2 gb in size. Following commands were executed to load the data and then the dspace user was updated to elogeo in <user directory>/elogeodspace/config/dspace.cfg file. The Apache and tomcat were stopped and restarted.

-bash-3.2$ createuser -U zzelogeo -d -P
Enter name of role to add: elogeo
Enter password for new role:
Enter it again:
Shall the new role be a superuser? (y/n) y
-bash-3.2$ createuser -U zzelogeo -d -P postgres
Enter password for new role:
Enter it again:
Shall the new role be a superuser? (y/n) y
-bash-3.2$ createdb -E UTF8 -T template0  dspacelm

-bash-3.2$ psql dspacelm < <user directory>/db_dump/elogeodump.sql

We noticed there is a memory issue, so we ran the following command, stopped and restarted Tomcat, but it did not help much.

-bash-3.2$ JAVA_OPTS=-Xmx2048m

This is a very common Java problem of heap space and we should be able to sort this out very soon. We will keep you posted on further developments.

Data plans

Amir from Nottingham University has shared some documentation to import and export the items for the DSpace repository.

Basically the preliminary plan is to try testing a bulk import on Mimas front, and then get the items from Nottingham. There is a need to understand this export/import mechanism well which is not documented very well.

Once we get a database dump, we will try to setup a mechanism to be in sync with any data updates/uploads so that both Nottingham and Mimas DSpace sites are mirroring each other.

Watch this space for more about the data migration.

Re-licensing of Learning Zone Content

The authors of the following courses contained within the Landmap Learning Zone have agreed to re-license their content as Creative Commons (CC) Attribution Non-Commerical Share Alike (BY-NC-SA)License
Learning Zone
Dr Peter Bunting (Aberystwyth University) – agreed 14/03/2012
1) Object-Oriented Classification
2) Python Scripting for ArcGIS

Neil Quarmy (IS Limited) – agreed 03/02/2011
3) Image Processing for ERDAS Imagine 2010
4) Image Processing for ERDAS Imagine v.9
5) Image Processing for Idrisi Kilimanjaro
6) Image Processing for ENVI
7) Image Processing for PCI Geomatica

Dr Andrew Sowter (University of Nottingham) – agreed 14/03/2012
8) Introduction to Radar

CC BY-NC-SA Explained

This allows users of the materials:

  • to Share — to copy, distribute and transmit the work
  • to Remix — to adapt the work

Under the following conditions:

  • Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • Noncommercial — You may not use this work for commercial purposes.
  • Share Alike — If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.

This license allows the GeoKnowledge Community to reuse and repurpose the materials if desired but still adheres to the terms and conditions of use of the sample spatial data provided in the courses.