Seeking Assistance with Using Custom Data

[Tarmactuna]

Hello WRF Community,

I'm currently working on generating more refined Land Surface Temperature (LST) maps using the WRF model. I have created some maps using the default settings and datasets but I don't think they are accurate enough and would like to refine these maps. To achieve this, I am attempting to incorporate more detailed datasets, specifically the NLCD 2021 land cover data and the USGS SRTM elevation data (If there is another way of getting more refined maps using the default data, please let me know). Despite following the tutorials and online presentations, I still face challenges in modifying the GEOGRID.TBL file and integrating this custom data into my WRF setup.

Steps I Have Taken:​

1. Data Preparation:
   • Downloaded the NLCD 2021 land cover data and USGS SRTM elevation data.
   • Ensured the data was in the correct format (GeoTIFF) and created the necessary index files using gdaltindex.
2. Tutorials Followed:
   • WPS Advanced Tutorial by Duda
   • Running WPS by Duda
3. Modifications Made:
   • Added entries in GEOGRID.TBL for the custom datasets with higher priority.
   • Updated the namelist.wps file to reference the custom data sources.

Current Configuration:​

GEOGRID.TBL Entries and namelist.wps file are attached below.

Issue Encountered:​

When I run geogrid.exe, I receive the following error:
ERROR: Could not find interpolator sequence for requested resolution for LANDUSEF. The sources specified in namelist.wps is not listed in GEOGRID.TBL.

Request for Assistance:​

I am seeking help with the following:

1. Correctly configuring the GEOGRID.TBL file to incorporate the custom datasets.
2. Ensuring the namelist.wps file properly references the custom data.
3. Any additional steps or common pitfalls to be aware of when using custom datasets in WRF.

Thank you in advance for your assistance. Any guidance or suggestions would be greatly appreciated.

 

[Ming Chen]

Please take a look at the post here, which describes how to use SRTM data in WPS.

As for NLCD2021 data, you may know that WPS includes NLCD data (2009?). Please read carefully how this NLCD data is incorporated, and follow the same approach to process NLCD2021 data.

Hope this is helpful for you.