[gradsusr] Geotiffs in Grads

[Jennifer Adams]

Hi, Nick --
What you are asking for is a 'dtype geotiff' which does not exist in  
GrADS. Turning the information in a geotiff file into a grid of values  
that you can analyze with GrADS is a job for customized stand-alone  
code. You may find some useful utilities to help you get started in  
the libgeotiff distribution.
--Jennifer


On Dec 21, 2010, at 10:29 AM, Nick Heath wrote:

> Hi everyone,
>
> I am working with oil spill data, and I need a way to display the  
> oil in my model.  I have geotiffs of the oil locations and I was  
> wondering if there is any way to read those into Grads.  I also have  
> the locations in .gif files.  If that is not possible, does anyone  
> have any good ideas of how I could make a "blob" of oil that I could  
> apply equations to (such as a wind drift to watch how it moved  
> through time)?
>
> Here is the config of the Grads I'm using:
>
> Config: v2.0.a8 little-endian readline printim grib2 netcdf hdf4-sds  
> hdf5 opendap-grids,stn geotiff shapefile
> Grid Analysis and Display System (GrADS) Version 2.0.a8
> Copyright (c) 1988-2010 by Brian Doty and the
> Institute for Global Environment and Society (IGES)
> This program is distributed WITHOUT ANY WARRANTY
> See file COPYRIGHT for more information.
>
> Built Fri Mar 26 10:24:10 EDT 2010 for x86_64-unknown-linux-gnu
>
> This version of GrADS has been configured with the following options:
>  o Built on a LITTLE ENDIAN machine
>  o Athena Widget GUI DISABLED
>  o Command line editing ENABLED
>      http://tiswww.case.edu/php/chet/readline/rltop.html
>  o printim command for image output ENABLED
>      http://www.zlib.net
>      http://www.libpng.org/pub/png/libpng.html
>      http://www.libgd.org/Main_Page
>  o GRIB2 interface ENABLED
>      http://www.ijg.org
>      http://www.ece.uvic.ca/~mdadams/jasper
>      http://www.nco.ncep.noaa.gov/pmb/codes/GRIB2
>      g2clib-1.1.8
>  o NetCDF interface ENABLED
>      http://www.unidata.ucar.edu/software/netcdf
>      netcdf 4.1.1-rc2 of Mar 23 2010 09:31:58 $
>  o OPeNDAP gridded data interface ENABLED
>  o OPeNDAP station data interface ENABLED
>      http://iges.org/grads/gadoc/supplibs.html
>      libgadap 2.0
>  o HDF4 and HDF5 interfaces ENABLED
>      http://hdfgroup.org
>      HDF 4.2r3
>      HDF5 1.8.4
>  o GeoTIFF and KML output ENABLED
>      http://www.libtiff.org
>      http://geotiff.osgeo.org
>  o Shapefile interface ENABLED
>      http://shapelib.maptools.org
>
> Thanks for the help!
>
> Nick
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--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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