Re: [idvusers] Issues opening NetCDF trajectory file in IDV and ToolsUI

Hi Yuan Ho,

We have also glider trajectories and we can open them with the IDV as
"Track file" data type. But if I open the surface drifter NetCDF file as
track file the IDV throws the exception attached in the TrackFileError
image. That's why testing the "Trajectory Sounding files" Data type is see
the time issue. I can't change the time units to seconds since 1980-01-06
00:00:00, so more testing is needed!.

Thanks a lot!

2012/3/6 Yuan Ho <yuanho@xxxxxxxxxxxxxxxx>

> On 3/5/2012 2:13 AM, Kristian Sebastián wrote:
>
>> Hi,
>>
>> We save the surface drifter data in NetCDF format and CF-1.6 ( like the
>> "dep0002_idrifter003_scb-**idrifter003_L1_2012-02_depth.**nc" attached
>> file).
>> When we try to display it through the IDV some issue :
>>
>>    - The "Data Source type" selected to open the NetCDF file is
>> "Trajectory
>>
>>    Sounding Files" no "Track files" (throws a BadDataexpception). Is the
>> data
>>    type correct?
>>
>
> Trajectory sounding Files is designed for the COMSIC dataset, if you want
> to use this type, you need to modify unit of time of your dataset to
> seconds since 1980-01-06 00:00:00, and the values too.
>
>
>
> Yuan
>
>>    - We can display the trajectory and the parameters like temperature,
>>
>>    platform speed ... but the displayed time in IDV is wrong
>> "3645241-01-9"
>>    (view MapViewSurfaceDrifterWrongTime image)
>>    - The axis Z is defined with the ALT (standard_name = altitude)
>>
>>    variable, but if the axis Z with the DEPTH (standard_name = depth)
>>    variable, only the bounding box is displayed in the "Map View" (view
>>    MapViewSurfaceDrifterOnlyBound**ingBox image)
>>
>> I have also tried to open the file with the ToolsUI-4.2.18 but I can't
>> open
>> it as "Trajetory" in the "FeatureType" (view FailedTodFindDataTypeFactory
>> image).
>> The coordinate system seems to be ok, I have checked it opening the file
>> with the tab "CoordSys".
>> As "PointFeature"-"TRAJECTORY" is possible to open it and display all the
>> dataset values (view PointFeatureTRAJECTORY image). The time values seems
>> to be ok, I don't why in the IDV the time value is wrong. An "unknown"
>> point is displayed in the map.
>>
>> Thanks
>>
>>
>>
>>
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-- 

 Kristian Sebastian Blalid
SOS Division: Data Center Technical
Tel: 971439860 - Fax: 971439979
E-mail: kristian.sebastian@xxxxxxxx <sonia.gomara@xxxxxxxx> /
kristian.sebastian@xxxxxx <sonia.gomara@xxxxxx>

Attachment: TrackFileError.png
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