[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[GEMPAK #JUU-911978]: gempak satellite images

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [GEMPAK #JUU-911978]: gempak satellite images
  • Date: Thu, 24 May 2007 16:24:36 -0600
> Hi,
> 
> We are attempting to use a basemap or mcidas topo area file with gempak and 
> overlay mcidas satellite images. Is this possible? The attached image is the 
> look we are trying to emulate.
> 
> 
> Thank you,
> 
> Justin
> 
> 


Justin,

Within GEMPAK, you can only display 1 image at a time, so it isn't possible
to use a topo area as a satfil and then overlay a second satfil.

The way that the product can be created in GEMPAK is to convert the satellite 
file to a
grid using a program I have created called IMG2GD, and then use grid functions 
to combine a 
topo field with the satellite image, then convert the composite grid back to an 
image
using a second program called GD2IMG.I have added functionality of these 
programs in the 5.10.2
release and tweaked in the past month or so.

I have attached a sample image I created using your jpg as a guide. I'll put 
together 
an example web page as a guide for how to create the composite grid --> image
and color table to display the composite since it will be a generally useful 
guide for others as well.

Steve Chiswell
Unidata User Support



Ticket Details
===================
Ticket ID: JUU-911978
Department: Support GEMPAK
Priority: Normal
Status: Closed