Re: Higher resolution topographic gempak sat files

Alan,

The entry in imgtyp.tbl you have below has the wrong channel ID. It
should
be 32768  (not 32761). The number is channel 16 (which equates to
2**(16-1)).

The gini image is the same format as the remapped imagery that NESDIS
puts on NOAAPORT. I'm using the GOES-7 satellite ID (shouldn't get any
conflicts there)
and channel 16 which is outside the range of bands for GOES-7 as well.

Steve Chiswell
Unidata User Support


On Wed, 2007-01-24 at 09:51 -0500, address@hidden wrote:
> Steve,
> 
> I was able to provide to the requestor a 300 dpi copy of the chart in
> question with the old "low res" topo as they don't need the hi res for a
> while.
> 
> So now I am trying to play with it a bit and am stuck.
> 
> Here's what I did.
> 
> 1. Downloaded the ustopo_dem5.gini and upc_dem5.tbl from the links you
> provided.
> 
> 2. Then copied locally a copy of the imgtyp.tbl into the same directory
> I am running gpmap.
> 
> 3.  Next I added the following entry to that, per your recommendation:
> TOPO      TOPO_DEM5    0 95 33  32761 upc_dem5.tbl
> 
> 4. And finally this is what I have for entries in gpmap
>  MAP      = 1
>  MSCALE   = 0
>  GAREA    = dset
>  PROJ     = sat
>  SATFIL   = ustopo_dem5.gini
>  RADFIL   =  
>  IMCBAR   =  
>  LATLON   =  
>  PANEL    = 0
>  TITLE    = 1
>  TEXT     = 1
>  CLEAR    = YES
>  DEVICE   = XW
>  LUTFIL   = upc_dem5.tbl
> 
> Yet when I run it I get this error:
> 
> "[IM 1]  No image type entry for file ustopo_dem5.gini"
> 
> I'm not sure what I am doing wrong here. Any recommedations would be
> greatly appreciated.
> 
> I assume that the "gini" file is in the correct format and doesn't need
> to be converted?
> 
> Thanks
> 
> Alan
> 
> 
> 
> 
> 
> 
> 
> ----- Original Message -----
> From: Steve Chiswell <address@hidden>
> Date: Thursday, January 11, 2007 5:58 pm
> Subject: Re: Higher resolution topographic gempak sat files
> 
> > Alan,
> > 
> > I'll be out of the office next week for the AMS,  but would be 
> > happy to
> > work with you 
> > more after I return.
> > 
> > It would be possible for me to provide you with the topo to grid to
> > image programs,
> > but you would have to run my binaries to do that until your version of
> > GEMPAK is capable of handling larger grids (since I use the grid
> > navigation routines to handle the
> > transformation from lat/lon projection to other projections). So, 
> > for a
> > quick start,
> > I provided a sample using the 5min dem data since it included 
> > bathymetryas the image you are currently using does.
> > 
> > I created a ~6km resolution GIF as a sample from the 5min dem data at:
> > http://www.unidata.ucar.edu/staff/chiz/gifs/topo_nam.gif
> > 
> > You can download the gini file that created the image at:
> > http://www.unidata.ucar.edu/staff/chiz/gifs/ustopo_dem5.gini
> > 
> > For GINI, I used the GOES7 satellite ID here since you probably cannot
> > remap an unused ID with your version of GEMPAK. The
> > $GEMTBL/sat/imgtyp.tbl entry to display this image is:
> > TOPO                 TOPO_DEM5     0     95     33  32768      1
> > upc_dem5.tbl
> > 
> > You can download the color table for your $GEMTBL/luts directory here:
> > http://www.unidata.ucar.edu/staff/chiz/gifs/upc_dem5.tbl
> > 
> > The GPMAP parameters to display the image as the GIF above is shown
> > below, where I've added:
> > BND = lakes/24 
> > to fill in the lakes as water color (since the DEM data would be above
> > sea level and not blue there). You can set the GAREA smaller than dset
> > as necessary.
> > 
> > GAREA  = dset
> > PROJ       = sat
> > SATFIL   = ustopo_dem5.gini
> > BND        = lakes/24
> > LUTFIL   = default
> > 
> > The 30 second data is great for smaller areas where you can take
> > advantage of the resolution, more therelater if you feed this is where
> > you want to go.
> > 
> > Steve Chiswell
> > Unidata User Support
> > 
> > On Tue, 2007-01-09 at 14:07 -0500, address@hidden wrote:
> > > Steve,
> > > 
> > > It's hard to say just what kind of resolution that we need as I 
> > am not
> > > sure what we are currently using. I think that maybe the one we 
> > use is 5
> > > min. We have had it for at least 5 years.
> > > 
> > > I really do not want this to be a lot of work for you. Is there 
> > any way
> > > that we could run the grid-to-image conversion on the data so we 
> > could> play around with various data sets to see what we like? 
> > (That assumes it
> > > would run on our workstations, which run RHEL3 and RHEL4.) It 
> > would be
> > > nice to have some background for general use that is better than 
> > what we
> > > have now but also a much better background if we need to produce 
> > much> higher quality images for publication.
> > > 
> > > Alan
> > > 
> > > 
> > > ----- Original Message -----
> > > From: Steve Chiswell <address@hidden>
> > > Date: Tuesday, January 9, 2007 12:43 pm
> > > Subject: Re: Higher resolution topographic gempak sat files
> > > 
> > > > Alan,
> > > > 
> > > > I have created both 30 second and 5 minute global topography 
> > (dem) 
> > > > datasets.
> > > > The 5 minute dem data has bathymetry, while the 30 second data 
> > set 
> > > > doesnot.
> > > > 
> > > > I provide these as a grid
> > > > (http://www.unidata.ucar.edu/downloads/gempak/tables/)
> > > > for use with a program I call GDTOPO which allows users to 
> > create a
> > > > subset for a Gempak grid file. However, it would be possible to 
> > map 
> > > > thegrid into an image to use as a background using the same 
> > grid to 
> > > > imageconversion that I do for our
> > > > radar composite images.
> > > > 
> > > > If you can provide some information regarding the resolution
> > > > (pixel-->km) you
> > > > need, I can look into making some background images.
> > > > 
> > > > Steve Chiswell
> > > > Unidata User Support
> > > > 
> > > > 
> > > > 
> > > > 
> > > > On Tue, 2007-01-09 at 10:50 -0500, Alan Robson wrote:
> > > > > Hi Mr Chiswell,
> > > > > 
> > > > > My name is Alan Robson and I work in the Development and 
> > Training 
> > > > Branch 
> > > > > of the Hydrometeorological Precipitation Center in Camp 
> > Springs, 
> > > > > Maryland.   I am not sure if you the right person to address 
> > this 
> > > > > request to and hope you will forward it to the appropriate 
> > > > individual if 
> > > > > you are not.
> > > > > 
> > > > > We produce many meteorological products for our webpage ( 
> > > > > http://www.hpc.ncep.noaa.gov/ ) that use a fairly low 
> > resolution 
> > > > > topographic gempak sat file as a background.   This is a 
> > sample 
> > > > of one 
> > > > > of our most popular products that gets very many webhits:  
> > > > > http://www.hpc.ncep.noaa.gov/noaa/noaa.gif
> > > > > 
> > > > > We are currently attempting to improve the appearance of our 
> > > > products 
> > > > > and need to find a higher resolution version of the 
> > topographic 
> > > > gempak 
> > > > > satellite file to use as a background.
> > > > > 
> > > > > Can you help us or give me the name of someone who can?
> > > > > 
> > > > > Thanks
> > > > > 
> > > > > Alan Robson
> > > > > HPC/NCEP
> > > > > Camp Springs, MD
> > > > > 
> > > > -- 
> > > > Steve Chiswell <address@hidden>
> > > > Unidata
> > > > 
> > -- 
> > Steve Chiswell <address@hidden>
> > Unidata
> > 
-- 
Steve Chiswell <address@hidden>
Unidata