Distance Units

[Garrett Sager]

Hi all,

What are the distance units in the dataset? I assume microns?

[Stuart Berg]

Hi Garrett,

> What are the distance units in the dataset? I assume microns?

In general, all coordinates and distances in neuprint are expressed in voxel units, i.e. the resolution of the base image data, which is 8nm.  To convert to microns, multiply by 8/1000.

Please see the release notes for more details:

https://neuprint.janelia.org/releasenotes

https://docs.google.com/document/d/1vae3ClHR8z8uekqwrOHtqiux3oY5-Y_xw6W2srCi3PI/edit?usp=sharing

Best regards,

Stuart

[Miranda D]

Is this the same for mitochondria size?  It's expressed in voxels?  How do I convert it to um3?

Thank you

[Berg, Stuart]

Yes, mito size is expressed in voxels.  Each voxel is 8nm wide (isotropic), so multiply by 8^3 to obtain nm^3, and divide that by 1e9 to obtain um^3.

mito = fetch_mitochondria(body)

mito['size_um3'] = mito['size'] * 8**3 / 1e9

On May 17, 2022, at 12:34 PM, Miranda D <miri...@gmail.com> wrote:

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