[IDV #HJT-379438]: Displaying Level III McIDAS Area Files

Hi Greg-

> Thanks Don I will experiment with it.

If you have any questions, let me know.

> By the way other than occasional hardware (graphics card?) issues --- gray 
> screen at times, corrupted main display --- transect with Level II data 
> (individual sweeps) seems to work fine. You are right windows and Open GL 
> don't get along real well.

Thanks for letting me know.  I'll keep it in there - good suggestion.

I run into problems on my system when I open multiple displays.  But everyone's
mileage varies on this it seems.


Don 
> Greg ...
> 
> -----Original Message-----
> From: Unidata IDV Support [mailto:address@hidden]
> Sent: Thursday, September 21, 2006 10:38 AM
> To: Salottolo Greg
> Cc: address@hidden
> Subject: [IDV #HJT-379438]: Displaying Level III McIDAS Area Files
> 
> 
> Hi Greg-
> 
> Jeff's answer is correct.  The basic problem is that when reading
> from disk, we have no way of calibrating the image. The ADDE server
> does the calibration when we read from the remote systems (and we
> calibrate when reading the raw Level III data).  The only
> solutions would be to:
> 
> - put the files on a local ADDE server and let the server calibrate
> 
> or
> 
> - when you grab the images through McIDAS IMGCOPY, use the UNIT= keyword
> to get a pre-calibrated image.  The UNIT's for Level III are:
> 
> ECHO - Reflectivity
> VIP  - Vip level
> TOPS - Echo Tops
> RAIN - Precip
> H2O  - VIL
> VEL  - Radial Velocity
> 
> Here's the imgcopy command I used:
> 
> IMGCOPY RTNEXRAD/N0R MYDATA/IMAGES.2001 UNIT=ECHO ID=FTG
> 
> When you display it in the IDV, you'll need to still set the range
> if you use the image display.
> 
> Don Murray
> 
> > >
> > > I would like to display a Level III McIDAS Area file in IDV. It loads OK 
> > > but the display is black.  Any thoughts?
> > >
> >
> > There is actually data there but the range of the data is ~0-6
> > and that is only in a small part of the image. The rest is 0.
> > With the default color table range of 0-255 you are getting mostly
> > black (using the gray scale color table).
> >
> > Try changing the Color range - right click on the color bar
> > and select "Change Range"
> >
> > You can also add a data probe or a data transect on this image to
> > see the actual values.
> >
> >
> > Don is out for a few days but I'll ask him to look at this file
> > to see if there is anything wrong about the data or our reading
> > of the data.
> >
> > -Jeff
> >
> 
> 
> Ticket Details
> ===================
> Ticket ID: HJT-379438
> Department: Support IDV
> Priority: Normal
> Status: Open
> 
> 
> 


Ticket Details
===================
Ticket ID: HJT-379438
Department: Support IDV
Priority: Normal
Status: Open