# Setting vegetation fraction (VEG) and LAI in WRF for CMAQ input

**URL:** <https://forum.cmascenter.org/t/setting-vegetation-fraction-veg-and-lai-in-wrf-for-cmaq-input/2512>\
**Category:** Meteorology\
**Created:** [July 16, 2021, 1:52pm UTC](https://forum.cmascenter.org/t/setting-vegetation-fraction-veg-and-lai-in-wrf-for-cmaq-input/2512 "2021-07-16T13:52:07Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![skunwar](https://avatars.discourse-cdn.com/v4/letter/s/9f8e36/32.png) [@skunwar](https://forum.cmascenter.org/u/skunwar)\
**Post date:** [July 16, 2021, 1:52pm UTC](https://forum.cmascenter.org/t/setting-vegetation-fraction-veg-and-lai-in-wrf-for-cmaq-input/2512/1 "2021-07-16T13:52:07Z")

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When running WRF for eventually proving meteorological input to CMAQ, what is the recommended practice for preparing the VEG and LAI parameters in WRF (pre 4.0 version). I saw this setting in the namelist.wps file being talked about in another post:

`geog_data_res = ‘nlcd2011_9s+9s+greenfrac_fpar_modis+lai_modis_10m’`

How would above differ from just setting

`geog_data_res = ‘nlcd2011_9s'`