Driver short name
libkea and libhdf5 libraries
GDAL can read, create and update files in the KEA format, through the libkea library.
KEA is an image file format, named after the New Zealand bird, that provides a full implementation of the GDAL data model and is implemented within a HDF5 file. A software library, libkea, is used to access the file format. The format has comparable performance with existing formats while producing smaller file sizes and is already within active use for a number of projects within Landcare Research, New Zealand, and the wider community.
The KEA format supports the following features of the GDAL data model:
Multiple-band support, with possible different datatypes. Bands can be added to an existing dataset with AddBand() API
Image blocking support
Reading, creation and update of data of image blocks
Affine geotransform, WKT projection, GCP
Metadata at dataset and band level
Per-band nodata and color interpretation
Per-band color table
Per-band RAT (Raster Attribute Table) of arbitrary size
Internal overviews and mask bands
This driver supports the
This driver supports the
This driver supports georeferencing
New in version 3.0:
This driver supports virtual I/O operations (/vsimem/, etc.)
The following creation options are available. Some are rather esoteric and should rarely be specified, unless the user has good knowledge of the working of the underlying HDF5 format.
IMAGEBLOCKSIZE=<integer>: Defaults to
256. The size of each block for image data.
ATTBLOCKSIZE=<integer>: Defaults to
1000. The size of each block for attribute data.
MDC_NELMTS=<integer>: Defaults to
0. Number of elements in the meta data cache. Defaults to 0. See the Data caching page of HDF5 documentation.
RDCC_NELMTS=<integer>: Defaults to
512. Number of elements in the raw data chunk cache. See the Data caching page of HDF5 documentation.
RDCC_NBYTES=<bytes>: Defaults to
1048576. Total size of the raw data chunk cache, in bytes. See the Data caching page of HDF5 documentation.
RDCC_W0=<floating_point_value between 0 and 1>: Defaults to
0.75. Preemption policy. See the Data caching page of HDF5 documentation.
SIEVE_BUF=<integer>: Defaults to
65536. Sets the maximum size of the data sieve buffer. See H5Pset_sieve_buf_size() documentation
META_BLOCKSIZE=<integer>: Defaults to
2048. Sets the minimum size of metadata block allocations. See H5Pset_meta_block_size() documentation
DEFLATE=[0-9]: Defaults to
1. Compression level between 0 (no compression) to 9 (max compression).
THEMATIC=[YES/NO]: Defaults to
NO. If YES then all bands are set to thematic.