FME can read data in the GRIB format.
GRIB is a file format designed by the World Meteorological Organization (WMO) for storing and transmitting gridded meteorological data, such as Numerical Weather Prediction model output.
GRIB Product and System Requirements
|
Format |
FME Platform |
Operating System |
||||
|---|---|---|---|---|---|---|
|
Reader/Writer |
FME Form |
FME Flow |
FME Flow Hosted |
Windows 64-bit |
Linux |
Mac |
|
Reader |
Yes |
Yes |
Yes |
Yes |
- Linux Intel: Yes - Linux ARM: No |
- macOS Intel: Yes - macOS ARM: No |
One GRIB file may contain multiple “messages,” each of which records a particular variable at a particular time (for example, temperature, pressure, precipitation, wind speed, etc.). FME generates a single raster feature per GRIB file, where each message is represented as a band.
Three editions of GRIB have been issued by the WMO. FME supports reading GRIB Edition 1 and GRIB Edition 2. GRIB Edition 0 is obsolete and not supported by FME.
Note the following known limitations of the GRIB reader:
- The GRIB format supports up to two Nodata values per band. FME will honor the first Nodata value from the first band, and apply this to all bands on the raster.
- Different messages in a GRIB file may have different dimensions. However, since messages are treated as bands, the dimensions and location of all messages will be forced to match those of the first message.
- Irregular grids (that is, grids that have a different number of cells per row) cannot be read.
Reader Overview
FME considers a single GRIB file to be a dataset. Each dataset contains a single FME raster feature.
FME Raster Features
FME raster features represent raster data and use several concepts that are unlike those used in the handling of vector data.
For comprehensive information about how FME processes raster data, see Rasters.
GRIB supports rasters with an arbitrary number of Real64 bands.