# How to quickly get the topographic maps

**URL:** https://mne.discourse.group/t/how-to-quickly-get-the-topographic-maps/7123
**Category:** Support & Discussions
**Tags:** eeg
**Created:** [June 21, 2023, 8:58am UTC](https://mne.discourse.group/t/how-to-quickly-get-the-topographic-maps/7123 "2023-06-21T08:58:14Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![DrinkSth](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/drinksth/32/2782_2.png) [@DrinkSth](https://mne.discourse.group/u/DrinkSth)
#### Post date: [June 21, 2023, 8:58am UTC](https://mne.discourse.group/t/how-to-quickly-get-the-topographic-maps/7123/1 "2023-06-21T08:58:14Z")

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I have some 64-channel EEG data, which has been pre-processed, and I can browse the waveform normally. Now I want to view the topographic map at a certain moment, but it takes more than 1 second to generate, and I need to wait every time I switch to other moments. How can I increase the speed of plot\_topomap？

import mne  
evoked = mne.EvokedArray(data)  
evoked.plot\_topomap() # wait long time