# Ground truth estimation for calculating localization error

**URL:** <https://mne.discourse.group/t/ground-truth-estimation-for-calculating-localization-error/8347>\
**Category:** Support & Discussions\
**Tags:** source-localization\
**Created:** [February 15, 2024, 7:14pm UTC](https://mne.discourse.group/t/ground-truth-estimation-for-calculating-localization-error/8347 "2024-02-15T19:14:52Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![SMMB](https://avatars.discourse-cdn.com/v4/letter/s/ad7895/32.png) [@SMMB](https://mne.discourse.group/u/SMMB)\
**Post date:** [February 15, 2024, 7:14pm UTC](https://mne.discourse.group/t/ground-truth-estimation-for-calculating-localization-error/8347/1 "2024-02-15T19:14:52Z")

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I am looking to calculate and compare the localization error of different source estimation methods. However, I am facing a challenge in selecting meaningful ground truth data to compare with the estimated source data obtained through each method.  
It is crucial to choose appropriate ground truth data to obtain the most plausible localization error for each method.  
I would appreciate a detailed response on this matter.

- MNE version: 1.6.1
- operating system: macOS 14

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**Author:** ![larsoner](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/larsoner/32/3_2.png) [@larsoner](https://mne.discourse.group/u/larsoner)\
**Post date:** [February 16, 2024, 1:55pm UTC](https://mne.discourse.group/t/ground-truth-estimation-for-calculating-localization-error/8347/2 "2024-02-16T13:55:00Z")

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I would suggest looking up previous recent papers on source localization accuracy and see what they did. I am not sure the state of the art offhand! You could start with phantom data for example, but it’s useful to work with simulated data. You could also look into [Adding new dataset (ground-truth for source localization) · Issue #7694 · mne-tools/mne-python · GitHub](https://github.com/mne-tools/mne-python/issues/7694) to see if the dataset was ever published (along with a paper).

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**Author:** ![SMMB](https://avatars.discourse-cdn.com/v4/letter/s/ad7895/32.png) [@SMMB](https://mne.discourse.group/u/SMMB)\
**Post date:** [February 18, 2024, 11:25am UTC](https://mne.discourse.group/t/ground-truth-estimation-for-calculating-localization-error/8347/3 "2024-02-18T11:25:55Z")

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Thank you very much for your valuable notes.

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\
**Post date:** [February 25, 2024, 11:26am UTC](https://mne.discourse.group/t/ground-truth-estimation-for-calculating-localization-error/8347/4 "2024-02-25T11:26:47Z")

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Closed on February 25, 2024, 11:26am UTC

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