# CMAQ-DDM5.4 simulation output is not resonable

**URL:** <https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209>\
**Category:** CMAQ-DDM-3D\
**Created:** [July 4, 2023, 12:36am UTC](https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209 "2023-07-04T00:36:35Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Sunshine](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@Sunshine](https://forum.cmascenter.org/u/Sunshine)\
**Post date:** [July 4, 2023, 12:36am UTC](https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209/1 "2023-07-04T00:36:35Z")

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I used the CMAQ-DDM5.4 to simulate a case. The spatial distribution was unreasonable. How to fix it ?

 ![1688430974490](https://canada1.discourse-cdn.com/flex027/uploads/cmas/original/2X/1/12f1aa416971d29a683fbc691ab06397cf69c6d0.png)

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**Author:** ![lizadams](https://avatars.discourse-cdn.com/v4/letter/l/49beb7/32.png) [@lizadams](https://forum.cmascenter.org/u/lizadams)\
**Post date:** [July 5, 2023, 8:21pm UTC](https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209/2 "2023-07-05T20:21:06Z")

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It is not clear what program or scripts that you are using to visualize your output. Have you tried to use VERDI? [CMAS: Community Modeling and Analysis System](https://cmascenter.org/verdi/) or ncview [Ncview | David W. Pierce, Scripps Institution of Oceanography](https://cirrus.ucsd.edu/ncview/)

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**Author:** ![sergey](https://avatars.discourse-cdn.com/v4/letter/s/9fc348/32.png) [@sergey](https://forum.cmascenter.org/u/sergey)\
**Post date:** [July 6, 2023, 6:16pm UTC](https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209/3 "2023-07-06T18:16:19Z")

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You need to provide way more details for anyone to be able to answer your question.

Also, and if you haven’t, I would recommend you read through the various documentation resources and tutorials that exist for CMAQ and then try to to reproduce the benchmark case that is provided to the public.

Sergey

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**Author:** ![Sunshine](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@Sunshine](https://forum.cmascenter.org/u/Sunshine)\
**Post date:** [July 13, 2023, 9:57am UTC](https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209/4 "2023-07-13T09:57:02Z")

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I used mimap in Meteoinfo to visualize the output.  
Thanks for recommending the other visualization software, I will learn more about it later.

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**Author:** ![Sunshine](https://avatars.discourse-cdn.com/v4/letter/s/3ec8ea/32.png) [@Sunshine](https://forum.cmascenter.org/u/Sunshine)\
**Post date:** [July 13, 2023, 10:01am UTC](https://forum.cmascenter.org/t/cmaq-ddm5-4-simulation-output-is-not-resonable/4209/5 "2023-07-13T10:01:11Z")

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Thanks for your reply. This problem has been solved. It could be caused by insufficient computing memory. I reduced the dimensions of the simulation and then the output was reasonable.