# Units of Coordinates in the ABC Atlas

**URL:** <https://community.brain-map.org/t/units-of-coordinates-in-the-abc-atlas/4997>\
**Category:** General\
**Tags:** atlas-mouse-brain-adult\
**Created:** [July 2, 2026, 1:41am UTC](https://community.brain-map.org/t/units-of-coordinates-in-the-abc-atlas/4997 "2026-07-02T01:41:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sora](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/sora/32/2634_2.png) [@Sora](https://community.brain-map.org/u/Sora)\
**Post date:** [July 2, 2026, 1:41am UTC](https://community.brain-map.org/t/units-of-coordinates-in-the-abc-atlas/4997/1 "2026-07-02T01:41:22Z")

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What are the units used for the x and y coordinates in the MERFISH with imputed gene dataset?

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**Author:** ![lauren.kruse](https://avatars.discourse-cdn.com/v4/letter/l/eb8c5e/32.png) [@lauren.kruse](https://community.brain-map.org/u/lauren.kruse)\
**Post date:** [July 2, 2026, 5:15pm UTC](https://community.brain-map.org/t/units-of-coordinates-in-the-abc-atlas/4997/2 "2026-07-02T17:15:24Z")

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Hi Sora,

If you are referring to the CCF registered coordinates, then it is in millimeters. Please let us know if you have any other questions.

Thank you,

Lauren