S111 -- S-111 Surface Currents Product

Driver short name


Build dependencies


Added in version 3.9.

This driver provides read-only support for surface currents in the S-111 format, which is a specific product profile in an HDF5 file.

S-111 files have two image bands representing the following values for each cell in a raster grid area:

  • surface current speed (band 1), in knots

  • surface current direction (band 2), in degree measured from true north clock-wise.

When opening a S-111 file, no raster band is directly available. But a list of subdatasets will be reported, one for each timestamp available in the file.

An actual dataset can be opened through such a subdataset, with a syntax like S111:"filename.h5":Group_001.

Georeferencing is reported.

Note that the driver currently only supports regularly gridded S111 datasets.

Driver capabilities

Supports Georeferencing

This driver supports georeferencing

Supports VirtualIO

This driver supports virtual I/O operations (/vsimem/, etc.)

Open options

Open options can be specified in command-line tools using the syntax -oo <NAME>=<VALUE> or by providing the appropriate arguments to GDALOpenEx() (C) or gdal.OpenEx (Python). The following open options are supported:

  • NORTH_UP=[YES/NO]: Defaults to YES. Whether the top line of the dataset should be the northern-most one.

    This is the default behavior of most GDAL formats, but the native organization of the data in S-111 products is to have the first line of the grid being the southern-most one. This native organization can be exposed by the driver by setting this option to NO (in which case the 6th term of the geotransform matrix will be positive)

See Also