Archive for November, 2010
BODC’s New data catalogue
by Jens on Nov.24, 2010, under Online Data Sources
British Oceanographic Data Centre has jsut announced a new facility on their website to search and retrieve data series directly from the web. While a lot of data could be retrieved before, this catalogue truly opens up access across all categories and project, with over 76,000 data series being put online in a searchable format. The series are mainly CTD casts, but also include bathymetry meterology, optical properties, wave data and more.
The great thing is that data is available in several recognised formats, NetCDF, ODV and ASCII files – so virtually everyone in the field can access this data in a preferred format.
There are some limitations in terms of the way you can refine searches, but most of them makes sense from the perspective of optimising searches and not hanging up the server in searches that return virtually everything.
By the time you have narrowed your search criteria to return 1,000 series or less, you can retrieve results. There’s the option of downloading a KML file of coverage, and you can retrieve data in your preferred format.
It is important to note that we’re talking data series, not individual points here, so even a single series can contain thousands of data points, giving you access to a seriously large amount of oceanographic data with a wide geographic coverage.
The initial map on the start page show waters around Britain, but make sure you either zoom out or pan around as there is data from a much wider region – virtually all of thw world - than what is shown on the map.
You do have to register an account with BODC in order to checkout your “data shopping”, but there is a huge amount of data freely available. The map tells you up front which data series are freely available.
BODC has truly made their data a lot more accessible with this exercise.
Ontology Part 4: Digging a bit deeper
by Jens on Nov.03, 2010, under General, Online Data Sources
- Syntactic Challenges – e.g. different models and languages
- Schematic Challenges – e.g. structural differences
- Semantic differences – e.g. different meanings and understandings.