• Linked Applications


Prior to the 2015 NCK days icebreaker, OpenEarth.nl organizes a hands-on sprint session to explain how to access and visualize some great open access core-description and grain size datasets of the Dutch coast:

i)                 Sediment Atlas WaddenZee (RWS): 7500(!) distribution curves in Marsdiep-EmsDollard

ii)                TNO 13.000(!) core descriptions for the Dutch continental shelf via NODC/SeaDataNet (and much, much more data available via DINOloket.nl)

iii)               TNO interpolated dz10, dz50, dz90 maps with 200m resolution for Dutch Continental Shelf

iv)               Along the Dutch beaches, grain sizes for dune safety assessment (RWS)

During this sprint session you’ll learn how to work with these free data in Matlab and/or python. Bring your own laptop to work with the data, and take home your data products and visualizations.

Time:             March 18th, 13:30-17:00  (max 10 participants, sponsored by NCK)

Location:       http://www.ijgenweisschoorl.nl (where icebreaker starts at 18:30)

Registration: Gerben J. de Boer (Van Oord) Gerben.deBoer@vanoord.com ism TNO, Deltares, TUD

Flyer:            NCK days 2015 sprintsession north sea grain sizes.pdf





Course information:

Access information for the data can be found at Dataset documentation.

You can download netCDF files (to prevent wifi overload) with BITSadmin. An example is for the TNO gain size maps is:

You can access subsets these files with the Matlab netCDF package called ncread and with the python package netcdf4-python, see our Matlab example and

python example.

TNO grain size maps

A Matlab simple example how to make a publication quality figure is given here


We used this image as Fig. 8 in our 2011 paper Mechanisms controlling the intra-annual mesoscale variability of SST and SPM in the southern North Sea.

Sedimentatlas waddensea

A second Matlab example is a dataset used for Fig 9 in our 2008 paper Modeling large-scale cohesive sediment transport affected by small-scale biological activity. Here's an exmaple how to work with these data, find more script in










We have opened the OpenEarthTools repository for reading to anonymous users. This makes it easier to link to apps, scripts, notebooks and tools in openearth from publications. 

It also helps in automating the deployment of our OpenEarth stack, which we use to expose our data, models and tools


As a part of the Delft Software Days (http://www.dsd-int.nl/) Deltares and 3TU.Datacentrum jointly organise the Data Science Symposium. The symposium will also be used as an occasion to celebrate the Dutch Data Prize 2012 that we won with OpenEarth.
Attendance is free of charge, but please make sure to register.

For more information see:


OpenEarth at Github

We recently moved a few projects over to github. The main code repository of OpenEarth is still hosted at subversion.

The projects that were moved are some projects were we expect collaboration with other software developers (BMI, MMI). These tend to appreciate the benefits of faster commits, local history and the pull request workflow over the more complex model of having a local as well as a remote repository.

Some have asked us why we are not moving everything to git. We have quite some experience in teaching people for whom version management is not an everyday, but more a few times per year activity. Learning the difference between init, pull, clone, fork, update, fetch, sync is not everybody's cup of tea.

One of the nice features of porting your code to github is that it is easy to setup a doi. This is also available for datasets in OpenEarth. If you want to have code moved to the openearth github, or if you want to know something about making your data or code citeable, please consult Fedor Baart or Gerben de Boer.

This is an example of the DOI for the Model Message Interface MMI code, which is cited for the IEMSS conference: http://dx.doi.org/10.5281/zenodo.9876

On Wednesday afternoon (13-17h) March 26th, an OpenEarth workshop is organised, as part of the NCK days 2014 at UNESCO-IHE. The theme of this year’s session is ‘Zandmotor’.

The monitoring data of the Zandmotor is stored at the 3TU datacentrum in a OpenEarth system (http://zandmotordata.nl).

The session will focus on the (newest) technical features of the server system and the actual data access (OPeNDAP and PostGIS/Geoserver) and vizualisation. Since the Zandmotor data is not publicly available yet, we will briefly discuss the procedure to get access to the data. We will practice with the same technology, using open data.

The session is organised by Kees den Heijer and Gerben de Boer.

  • when: Wednesday March 26th, 2014 13.00-17.00h
  • where: UNESCO-IHE, Delft
  • sign-up: please register via http://nckdays2014.eventzilla.net/
  • !!  Bring your own data and laptop !!