Accueil
under construction...
This page aims to be a central point to access useful data and related documentations, either locally managed or from external data center. It comes as a complementary data access with regards to the LEGOS products distribution one (http://www-apache.legos.obs-mip.fr/en/soa/).
Geodetics
♦ Bathymetry
- local archives:
- EMODNET:
This a composite bathymetry supported by the EU (http://www.emodnet-hydrography.eu)
The native NetCDF format is quite poor, so you better use the reformatted files in:
srv-ecola:/data/depository/data/topography/regional/: EMODNET-2012, EMODNET-2013
- composites:
- European Waters Bathymetry
- Seine estuary
- Gironde estuary
- digital MDTs distribution centres, data and documentation
- NGDC ship track database :
Historical ship-tracks data (including bathymetry) used in most of GEBCO DTMs. Data can be easily selected and downloaded from the following NOAA web site http://maps.ngdc.noaa.gov/viewers/geophysics , at various format including the helpfull XYZ one.
♦ Land Elevation
- Global Land One-km Base Elevation Project : http://www.ngdc.noaa.gov/mgg/topo/globe.html (raster files, regional tiles)
- Shuttle Radar Topography Mission: http://glcf.umiacs.umd.edu/data/srtm (USGS user registration needed to download data) 3"arc and 1"arc; preferably to be accessed through http://earthexplorer.usgs.gov, in dataset Digital Elevation > SRTM > ...
- ASTER database : https://reverb.echo.nasa.gov (NASA user registration needed to download data) 3"arc resolution; can also be accessed through http://earthexplorer.usgs.gov
The earthexplorer website gives access to a lot of geophysical data set, and users are encouraged to preferably use it. Registration is quite simple, and data download interface not that difficult.
GDAL package is extremely useful to transform (a great bunch of) data format toward your favourite format. If you want to turn your downloaded file "my_download.funny" into Netcdf file format, then the following line is very likely to do the trick:
> gdal_translate -of netCDF my_download.funny my_download.nc
NB: GLOBE DEM is rather low resolution and not very accurate. ASTER seems to be much noiser than SRTM.
Shorelines
A collection of precise shorelines databases, most of them already made available on ECOLA server (see /data/depository/data/shorelines). Open data websites:
- OpenStreetMap: a useful download site can be found at http://download.geofabrik.de
- GSHHS: closed polygons, available at https://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html
It is also possible to extract shorelines from SRTM elevations (SIROCCO tools, shorelines-extractor).
Geographic reference systems
In alongshore applications, vertical and horizontal references must be handled carefully. In The COMODO-TOOLS package, geographical projection and ellipsoids are treated through the PROJ4 library.
Sea level observations
Tide gauges
Altimeter tide gauges
Ocean and Atmosphere simulations archives
♦ ECMWF:
- ECMWF meteorological local archives
- ECMWF products centre access
Tidal atlases (global and regionals)
♦ Storm surges (global and regionals)
(in construction)
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