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[IDV #ATI-521918]: Streamlines do not align when chosing a projection both sides of Zero meridian

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  • Subject: [IDV #ATI-521918]: Streamlines do not align when chosing a projection both sides of Zero meridian
  • Date: Mon, 18 Mar 2013 17:18:13 -0600
> Full Name: Eilert Schwarting
> Email Address: address@hidden
> Organization: Schwarting
> Package Version: 3.1u1 build date:2012-11-30 17:36 UTC
> Operating System: Windows NT (unknown)
> Hardware: Java: home: C:\Program Files\IDV_3.1u1\jre version: 1.6.0_31 
> j3d:1.5.2 fcs (build4)
> Description of problem:
> 
> Streamlines are not recalculated when projection is changed from a
> display centred at 180 meridian to one centred on zero meridan.
> 

Hi Eilert,
        For a dataset with certain projection, you can call a grid formula to 
flip the grid to (-180 180) and display the streamlines in the area centered on 
zero meridan. I tried the dataset 

dods://www.esrl.noaa.gov/psd/thredds/dodsC/Datasets/ncep.reanalysis.dailyavgs/pressure/hgt.1993.nc
 

and it works. You can do it this way:

 

Formula > Grids > Define a grid diagnostic, and select the vector display, when 
a window popup,  type in lonFlip(a), when a new window popup, select vector 
field. 

Yuan

> This is related to:
> Ticket ID: YOD-853415
> Subject: Data Display incorrect when choosing Projection other than Default 
> Projection provided by the Data
> Department: Support IDV
> Priority: Normal
> Status: Open
> 
> 
> 


Ticket Details
===================
Ticket ID: ATI-521918
Department: Support IDV
Priority: Normal
Status: Closed