S111 -- S-111 Surface Currents Product
Driver short name
S111
Build dependencies
libhdf5
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.
Since GDAL 3.12, multiple feature instance groups per dataset (to encode grids
using different vertical datums) are supported. In that case, each feature
instance group and timestamp group is exposed as a GDAL subdataset, whose name
is of the form S111:"{filename.h5}":SurfaceCurrent.{XX}:Group_{YYY}.
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)