# Running the 2017 emissions modeling platform for other grids **URL:** \ **Category:** SMOKE\ **Created:** [July 5, 2023, 5:08pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213 "2023-07-05T17:08:10Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![LYM](https://avatars.discourse-cdn.com/v4/letter/l/b38774/32.png) [@LYM](https://forum.cmascenter.org/u/LYM)\ **Post date:** [July 5, 2023, 5:08pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/1 "2023-07-05T17:08:10Z")
Hello everyone, I am a new user for the 2017 emissions modeling platform. I would like to run the 2017 emissions modeling platform for other grids. The README file says that: The scripts can be adapted to run for other grids. First, in the directory\_definitions.csh script, edit REGION\_ABBREV and REGION\_IOAPI\_GRIDNAME. You also may need to change other inputs in each individual sector script, such as spatial surrogates (SRGPRO / SRGDESC), transportable fractions (XPORTFRAC), gridded meteorology for onroad (METMOVES), ocean chlorine (for the sector merge), and biogenic land use and seasons (BELD4 and BIOSEASON). I know how to edit SRGPRO / SRGDESC file, but how can I change these .ncf file such as XPORTFRAC, METMOVES, BIOSEASON for fitting my own grids? Much appreciated for your help! Thank you, Lingyun ---
**Author:** ![eyth.alison](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@eyth.alison](https://forum.cmascenter.org/u/eyth.alison)\ **Post date:** [July 5, 2023, 5:31pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/2 "2023-07-05T17:31:12Z")
Is your grid aligned with the EPA grids at 12 or 4km or is it a different map projection with grid cells that are not aligned? ---
**Author:** ![LYM](https://avatars.discourse-cdn.com/v4/letter/l/b38774/32.png) [@LYM](https://forum.cmascenter.org/u/LYM)\ **Post date:** [July 5, 2023, 9:49pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/3 "2023-07-05T21:49:09Z")
My map projection is the same as the EPA map projection now. The original grid setting at the 2017 emissions modeling platform is: ‘12CONUS1’ 2, 33.0D0, 45.D0,-97.D0,-97.D0, 40.D0 ‘12US1\_459X299’, ! abbrev.=12US1, common name = Continental 12km grid ‘12CONUS1’, -2556000.000, -1728000.000, 12.D3, 12.D3, 459, 299, 1 My own gridding setting is: ‘LAM\_40N97W’ 2 33.000 45.000 -97.000 -97.000 40.000 ’ ’ ‘US12NE’ ‘LAM\_40N97W’ 756000.000 -456000.000 12000.000 12000.000 130 140 1 ---
**Author:** ![LYM](https://avatars.discourse-cdn.com/v4/letter/l/b38774/32.png) [@LYM](https://forum.cmascenter.org/u/LYM)\ **Post date:** [July 20, 2023, 7:40am UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/4 "2023-07-20T07:40:59Z")
Hi Alison, Now I could run the 2017 emissions medoling platform successfully with my own domain and the horizontal resolution of 12km using those tools’ zip files released on the EPA website([https://gaftp.epa.gov/Air/emismod/](https://gaftp.epa.gov/Air/emismod/)). I have another question that what should I do if I want to run the 2017 emissions medoling platform with the EPA grids at 30 km? Much appreciated for your help! Best wishes, Lingyun ---
**Author:** ![eyth.alison](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@eyth.alison](https://forum.cmascenter.org/u/eyth.alison)\ **Post date:** [July 20, 2023, 12:05pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/5 "2023-07-20T12:05:20Z")
We don’t typically use a 30km grid. Did you mean 36km? We haven’t applied a 36km grid o 2017 platform but we have used it for our 2016 platform, although that wouldn’t necessarily stop you from running 2017 with the 36km grid. ---
**Author:** ![LYM](https://avatars.discourse-cdn.com/v4/letter/l/b38774/32.png) [@LYM](https://forum.cmascenter.org/u/LYM)\ **Post date:** [July 20, 2023, 9:14pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/7 "2023-07-20T21:14:48Z")
I notice that the spatial surrogates at different grids (4, 12, 36km) are provided on [https://gaftp.epa.gov/Air/emismod/2016/v1/spatial\_surrogates/](https://gaftp.epa.gov/Air/emismod/2016/v1/spatial_surrogates/). But If possible, I would like to use 30km grid because my mcipout data is at 30km grid. Thank you! ---
**Author:** ![eyth.alison](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@eyth.alison](https://forum.cmascenter.org/u/eyth.alison)\ **Post date:** [July 20, 2023, 10:33pm UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/8 "2023-07-20T22:33:02Z")
Unfortunately, since the grids don’t align, you would need to recreate the spatial surrogates from scratch on your grid. See [https://www.cmascenter.org/surrogate\_tools\_db/](https://www.cmascenter.org/surrogate_tools_db/) An alternative is it interpolate your met. data onto a modeling grid that matches the available surrogates, but you may not want to do that. ---
**Author:** ![LYM](https://avatars.discourse-cdn.com/v4/letter/l/b38774/32.png) [@LYM](https://forum.cmascenter.org/u/LYM)\ **Post date:** [July 21, 2023, 1:29am UTC](https://forum.cmascenter.org/t/running-the-2017-emissions-modeling-platform-for-other-grids/4213/10 "2023-07-21T01:29:56Z")
Okay, I would try to recreate the spatial surrogates. Thank you!