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

[Tom Hultquist]

Thank you Paula, I appreciate the info. I'll probably first see if GSD's
TopoGrabber software will work for me, since it appears to be designed to
simplify the task (it is a beta release, so I could run into problems, but
it certainly looks to simplify things). But, if I strike out there, I'll
take a look at your notes and some of the other resources. Thanks again.

tom

Tom Hultquist
University of Minnesota
Department of Soil, Water, & Climate
Borlaug 165
hultq016 at umn.edu
612-208-2127


On Mon, Mar 31, 2014 at 7:01 AM, Paula Doubrawa <pdoubraw at indiana.edu>wrote:

> 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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