[Wrf-users] Using High Resolution NED for Topography in Geogrid

[Paula Doubrawa]

Hi, Tom

I have just gone through the process myself and it did take a lot of
messing around because the resources out there are a bit confusing. I don't
have a detailed list of steps but this is what I found in my notebook:

The way I got (one tile) of NED to work with WRF
- Download tiles from the (http://www.mrlc.gov/viewerjs/), but .bil format
is not available so download geotiff;
- Use gdal_translate to convert to .bil (*gdal_translate -of ENVI file.tif
file.bil*)
- Use matlab to convert to unsigned integer as below
X = multibandread('NED_55555838.bil', [4342, 4954, 1], 'float', 0, 'bil',
'ieee-le') ;
X=X*100;
X=uint32(X);
X=round(X);
multibandwrite(X,'NED_55555838_UINT32.bil', 'bil') ;
- Edit index file, add scale_factor and other necessary things
- Edit geogrid.tbl
- Ready to run geogrid

I hope this helps a bit. If not feel free to send me a message directly.

Paula


On Sun, Mar 30, 2014 at 4:23 PM, Tom Hultquist <hultq016 at umn.edu> wrote:

> I've found a few resources online that describe how one can use the USGS
> NED data within WRF so that 10 m topography can be utilized. However, none
> of the resources I've found thus far go into great detail on how to go
> through the process. I might be able to work through it, but figured I
> would first ask to see if anyone knows of a resource that may explain how
> to do so in a nice end-to-end manner.
>
>
> Tom Hultquist
> University of Minnesota
> Department of Soil, Water, & Climate
> Borlaug 165
> hultq016 at umn.edu
> 612-208-2127
>
> _______________________________________________
> Wrf-users mailing list
> Wrf-users at ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>
>


-- 
*Paula Doubrawa*
PhD Student
Atmospheric Sciences Program
Department of Geological Sciences
Indiana University
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