This section documents and provides learning resources about the different CEMS-Flood data formats and structures.
CEMS-Flood data are available in two formats: GRIB2 and NetCDF4.
GRIB2, the format in which the data is stored in the MARS archive, is the official supported format.
NetCDF4 is also supported for the datasets (see Table 1).
CEMS-Flood has two services for different spatial domains, EFAS (for Europe) and GloFAS (for the world), each consisting of:
- 5 model outputs: Historical, Forecast, Reforecast, Seasonal Forecast, and Seasonal Reforecast.
- Auxiliary datasets
Note that each dataset can differ in structure and format supported, more information can be found in the GRIB2 and NetCDF4 sections.
A comprehensive summary is outlined in the table below.
Table 1 - Available data formats by data access service. The auxiliary files are indicated in green.
Service Provider | Dataset | Format |
---|---|---|
EFAS | Historical | GRIB2 and NetCDF4 |
Forecast | GRIB2 and NetCDF4 | |
Reforecast | GRIB2 and NetCDF4 | |
Seasonal | GRIB2 and NetCDF4 | |
Seasonal Reforecast | GRIB2 and NetCDF4 | |
Upstream area | NetCDF4 | |
Elevation (Digital Elevation Model) | NetCDF4 | |
Soil depth | NetCDF4 | |
Field capacity | NetCDF4 | |
Wilting point | NetCDF4 | |
GloFAS | Historical | GRIB2 |
Forecast | GRIB2 and NetCDF4 | |
Reforecast | GRIB2 | |
Seasonal | GRIB2 | |
Seasonal Reforecast | GRIB2 | |
Upstream area | NetCDF4 | |
Elevation (Digitial Elevation Model) | NetCDF4 |
Table 2 - Information on EFAS and GloFAS grids
Dimensions | Resolution | Projection | Coordinates of the upper left corner of the domain (lat, lon) | Coordinates of the bottom right corner of the domain (lat, lon) | Number of data points | ||
---|---|---|---|---|---|---|---|
Latitude (rows) | Longitude | ||||||
EFAS | 950 | 1000 | 5 x 5 km | EPSG:3035 (Lambert Azimuthal Equal Area) | 2500000, 5500000 | 7500000, 750000 | 950000 |
GloFAS | 1500 | 3600 | 0.1° x 0.1° | EPSG:4326 (WGS 84) | 89.95, 180.05 | -59.95, -1 | 5400000 |