.. index:: NRRD (Nearly Raw Raster Data)
.. index:: .nrrd, .nhdr, .raw, .txt

NRRD (Nearly Raw Raster Data)
===============================================================================

Extensions: .nrrd, .nhdr, .raw, .txt

Developer: `Teem developers <https://teem.sourceforge.net/>`_


**Support**


BSD-licensed: |yes|

Export: |no|

Officially Supported Versions: 

Reader: NRRDReader (:bsd-reader:`Source Code <NRRDReader.java>`, :doc:`Supported Metadata Fields </metadata/NRRDReader>`)


Freely Available Software:

- `nrrd (NRRD reference library) <https://teem.sourceforge.net/nrrd/>`_

Sample Datasets:

- `Diffusion tensor MRI datasets <http://www.sci.utah.edu/%7Egk/DTI-data/>`_

We currently have:

* an `nrrd specification document <https://teem.sourceforge.net/nrrd/format.html>`_ (v1.9, from 2005 December 24, in HTML) 
* a few nrrd datasets 
* `public sample images <https://downloads.openmicroscopy.org/images/NRRD/>`__



**Ratings**


Pixels: |Very good|

Metadata: |Very good|

Openness: |Outstanding|

Presence: |Fair|

Utility: |Very good|



