[IDV #PJD-558513]: Wind barbs plotted in Layer Controls tab default to 5kt out of NE no matter what the actual wind is when the ID at the location is missing. [1076]

Dear User,

There is indeed a problem here but the diagnosis below is incorrect. It is not 
related to SVN check in 13892, nor is it limited to wind data.

At any rate, please give the IDV nightly build a try tomorrow and you should 
hopefully see your problem fixed.

Best,

Unidata IDV Support

> It looks like Bob found a problem with one of your commits from last month.
> 
> When plotting point data, if a station has a blank field for ID, the barb 
> plotted in the Plot tab of the Layer Controls will be a 5kt wind out of the 
> north east no matter what the speed and direction are. These barbs will plot 
> correctly in the Main Display Window.
> 
> 
> ----==== Inquiry ====----
> 1076
> 
> ----==== Summary ====----
> Wind barbs plotted in Layer Controls tab default to 5kt out of NE no matter 
> what the actual wind is when the ID at the location is missing.
> 
> ----==== Request ====----
> 2011-07-12 - Bob Carp
> I just re-checked this with the McV nightly from 7/12 with the IDV from 7/12. 
> The only difference that I am seeing now is that when a station is missing an 
> ID, it reverts to a 5kt wind out of the NW instead of NE in the Layer 
> Controls tab. McV still has both ID and IDN as fields, while the IDV only has 
> ID.
> 
> 2011-07-12 - Bob Carp
> This is related to Inq 1048: 
> http://dcdbs.ssec.wisc.edu/inquiry-v/?inquiry=1048 and Inq 1069: 
> http://dcdbs.ssec.wisc.edu/inquiry-v/?inquiry=1069
> 
> How to replicate the problem:
> 1. Data Sources tab -> Point Obs -> Plot/Contour
> 2. Server: adde.ucar.edu; Dataset: RTPTSRC; Point Type: SYNOPTIC; most recent 
> time
> 3. Field Selector tab: Point Data; Point Data Plot; Layout Model -> 
> Observations -> Winds; Create Display
> 4. Layer Controls tab: Plot tab; Add DIR and SPD to chart by right clicking 
> on them and Add To Chart
> 5. Right click on wind barbs in the Main Display Window and they will also 
> plot in Plot tab of Layer Controls
> 
> - Some stations have a blank field for ID. When this occurs, the barb plotted 
> in the Plot tab of the Layer Controls will be a 5kt wind out of the north 
> east no matter what the speed and direction are. These barbs will plot 
> correctly in the Main Display Window.
> 
> There used to be a similar problem in the IDV, where when the IDN was 
> missing, the barb would default at 10kt out of the south east. However, as of 
> their nightly dated 07/12, this is no longer a problem. This is because they 
> have removed the IDN field from the list in the Plot tab of their Displays 
> tab. I believe the fix that they put through for this was on 07/06:
> 
> Author: chastang
> Date: 2011-07-06 14:34:34 -0600 (Wed, 06 Jul 2011)
> New Revision: 13892
> 
> Modified:
> idv/trunk/ucar/unidata/idv/control/chart/TimeSeriesChart.java
> Log:
> NaN wind directions must be special cased b/c they cannot be thrown away lest 
> they get out of sync with speed causing rendering problems for wind barbs.
> 
> We can test this again once we pick up a more recent version of the IDV to 
> see how this may affect things.
> 
> 
> ################################################################################
> 
> http://dcdbs.ssec.wisc.edu/inquiry-v/index.php?inquiry=1076
> 
> 


Ticket Details
===================
Ticket ID: PJD-558513
Department: Support IDV
Priority: Normal
Status: Closed