IDV users,
We have some Level II radar data on a local file system and are
trying to plot it using the IDV (v.2.1 on various Macs), following
the instructions in the Users Guide. We can plot the data themselves
OK, but the map background is centered at 0 degrees N and 0 degrees E
(in Africa's Gulf of Guinea) no matter what we've tried.
The data are in a local file named KOAX20040522_011610. (I've also
tried renaming it KOAX_20040522_0116.) I've tried placing the file in
a directory called KOAX and also in a directory called OAX. The file
(and a number of others like it) are accessible on the Web at: http://
funnel.sfsu.edu/data/cases/jm/040522_nebraska_trndos/LevII/KOAX/.
Here's the procedure(s) we've tried:
(1) New Data Source > From the File System. In the "FIles" list,
click on "Radar". Select "Omaha/Valley" from the "Radar Location"
menu. Navigate to the directory containing the data file. Select the
file. Click on the "Add Source" button.
(2) In the Dashboard, under "Data Sources", I get the entry
"Level II Radar Data (XXXX)", so it appears that the IDV doesn't know
where the station is, even though it was specified using the "Radar
Location" menu and resides in a directory called KOAX (or OAX). In
the "Fields" window a list of fields appears. Selecting a field and a
display type and clicking on the "Create Display" button produces a
display. It is located in the Gulf of Guinea.
On the Map Display - One Pane" window, under "Displays", the field is
identified as "XXXX Reflectivity - 2D Radar Sweep View". Clicking on
this name produces a Dashboard dialog window in which the station is
correctly identified as "OAX Lat: 41.3 Lon: -96.4 Alt: 350.0".
None of these problems occur if I access Level II data via an ADDE
server.
Can anyone spot what we might be doing wrong? (I think I've been here
before but can't remember the answer!)
-- Dave
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Begin forwarded message:
From: John Monteverdi <montever@xxxxxxxxxxxxx>
Date: March 13, 2007 3:59:37 PM PDT
To: Dave Dempsey <ddempsey@xxxxxxxxxxxxxxx>
Subject: Bug in idV...running on Pentium Macs
Dave,
I think I encountered a pretty serious bug in iDV (and Nexrad Radar
Viewer) running on "tornado" but not on my home desktop (which is
not Pentium).
I downloaded Level II and Level III data sets for February 25, 2004
for KMUX. On idv these data sets misplot geographically. The
Level II stuff plots at too small a scale relative to the map
background (meaning, echoes over SF appear over San Mateo). On
Nexrad Radar Viewer, the option to "smooth" the radar crashes the
software.
Both idv and Nexrad Radar Viewer run OK and plot OK at home.
Thus, I think the issue might be with the Pentium chip, and/.or
Java running natively on a Pentium Mac.
John
