# Aligning Neuropixels CCF coordinate and annotation ccf\_2017

**URL:** <https://community.brain-map.org/t/aligning-neuropixels-ccf-coordinate-and-annotation-ccf-2017/5089>\
**Category:** Technical\
**Tags:** atlas-reference-maps\
**Created:** [September 29, 2026, 6:58am UTC](https://community.brain-map.org/t/aligning-neuropixels-ccf-coordinate-and-annotation-ccf-2017/5089 "2026-09-29T06:58:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Gazi](https://avatars.discourse-cdn.com/v4/letter/g/76d3ee/32.png) [@Gazi](https://community.brain-map.org/u/Gazi)\
**Post date:** [September 29, 2026, 6:58am UTC](https://community.brain-map.org/t/aligning-neuropixels-ccf-coordinate-and-annotation-ccf-2017/5089/1 "2026-09-29T06:58:21Z")

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I am very confused as to how to align for example, ecephys\_session\_756029989.nwb has in channels, a row - anterior\_posterior\_ccf\_coordinate - 8993 dorsal\_ventral\_ccf\_coordinate - 585, left\_right\_ccf\_coordinate - 585, structure\_acronym - VISp. Now, if i am using the 10um ccf\_2017 nrrd file, will annotation[899, 58, 58] point towards a voxel in VISp area? Basically what i am asking is how can i use the position given in the nwb file, to align to a point in annotation?

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**Author:** ![Gazi](https://avatars.discourse-cdn.com/v4/letter/g/76d3ee/32.png) [@Gazi](https://community.brain-map.org/u/Gazi)\
**Post date:** [September 29, 2026, 8:02am UTC](https://community.brain-map.org/t/aligning-neuropixels-ccf-coordinate-and-annotation-ccf-2017/5089/2 "2026-09-29T08:02:18Z")

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also, please clarify to me if 8993, 585, 585 are relative to CCF origin or something like Bregma. Why are in so many of the readings dv and left\_right (ml) the same value, for example here 585, 585.