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[IDV #ZRS-639947]: resolution of image over topography

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  • Subject: [IDV #ZRS-639947]: resolution of image over topography
  • Date: Fri, 11 Dec 2009 10:27:14 -0700
Hi Bill-

> Full Name: bill fingerhut
> Email Address: address@hidden
> Organization: lyndon state college retired
> Package Version: 2.8a1 build date:2009-11-03 08:08 UTC
> Operating System: Windows XP
> Hardware: Java: home: C:\Program Files\IDV_2.8a1\jre version: 1.6.0_13 
> j3d:1.5.2 fcs (build4)
> Description of problem:

> I've been using a formula (formula, imagery, image over topography) to
> drape an image over topography. Unfortunately, the result has much less
> resolution (detail) than I need. I was hoping the result would have as
> much resolution as the topography, but this is not the case.
> 
> What determines the resolution of the result, and is there any way I
> can impove the results?

The topography is resampled to the image so that you could have an image larger
than the topography.

> BTW, the topgraphy is 30 sec. from a catalog, and image is an image
> capture from the IDV map view. More questions later!

I'll add an option to allow resampling to the topography domain to the next 
nightly
build.  You could then call this procedure:

def topo2(image, topo):
   import ucar.unidata.data.grid.DerivedGridFactory as dgf
   return dgf.create2DTopography(image, topo, 1)

You can select Image over Topography as your display for now, but you'll have to
select it twice.  Once you've tested this, I'll figure out how to bubble it up
to make it easier. I don't want to change the default behavior right now.

Don


Ticket Details
===================
Ticket ID: ZRS-639947
Department: Support IDV
Priority: Normal
Status: Open