[ncl-talk] NCL coordinates erroe

[Alan Brammer]

Kunal,

Coordinates:
            G3fakeDim0: [-0.04166399..25.95834]
            G3fakeDim1: [59.95834..94.95834]
Are these coordinates correct with respect to the data?   NCL map routines
expect coordinates to have lat/lon relative units .e.g "degrees_north".
Therefore if the data is expect to span 0 to 25N and 60 to 94E, you could
first rename the coordinates so they are a litle more user friendly, then
attach the respective units to both lat and lon coordinates.


!!!!  This is untested psuedo-code it  may not work directly but should
show the general idea to be applied. Please edit appropriately !!!!

VAR!0 = "lat"
VAR!1 = "lon"

printVarSummary(VAR&lat)

VAR&lat at units = "degrees_north"
VAR&lon at units = "degrees_east"

printVarSummary(VAR&lat)

On Wed, Oct 15, 2014 at 12:50 AM, Kunal Bali <kunal.bali9 at gmail.com> wrote:

> Dear NCL users
>
> printVarSummary(VAR) shows the
>
> Variable: VAR
> Type: float
> Total Size: 527092 bytes
>             131773 values
> Number of Dimensions: 2
> Dimensions and sizes:    [G3fakeDim0 | 313] x [G3fakeDim1 | 421]
> Coordinates:
>             G3fakeDim0: [-0.04166399..25.95834]
>             G3fakeDim1: [59.95834..94.95834]
> Number Of Attributes: 11
>   Scaling :    linear
>   Slope :    0.000717185
>   Scaling_Equation :    (Slope*l3m_data) + Intercept = Parameter value
>   Intercept :    -2
>   Fill :    65535
>   _FillValue :    65535
>   structureType :    Grid
>   unitsCategory :    science
>   units :    C
>   scale_factor :     1
>   add_offset :     0
>
>
>
> Kunal Bali
> Research Scholar
> Radio & Atmospheric Science Division
> CSIR - National Physical Laboratory
> New Delhi - 110012
>
>
>
>
>
>
> On Wed, Oct 15, 2014 at 2:40 AM, Maria Gehne - NOAA Affiliate <
> maria.gehne at noaa.gov> wrote:
>
>> Hi Kunal,
>>
>> most likely your data does not have coordinate variables attached to it.
>> What does the printVarSummary(VAR) return? That should tell you if your
>> data has lat/lon coordinates. If it doesn't then you need to attach those
>> prior to plotting. You seem to know what the latitudes  and longitudes of
>> your data are supposed to be so you could generate the two arrays for lat
>> and lon yourself if they are not in the file.
>>
>> Hope this helps. Replies to NCL-talk only please.
>>
>> Maria
>>
>> On Tue, Oct 14, 2014 at 11:53 AM, Kunal Bali <kunal.bali9 at gmail.com>
>> wrote:
>>
>>> Dear NCL users
>>>
>>> I tried to plot SST.nc attached file through NCL . Actually the SST.nc
>>> file have the coordinates from lat - 0 26 and lon - 60 95
>>>
>>> But when i run the scripts so its showing data all over the world not on
>>> my coordinates, see the SST.pdf file
>>>
>>> How to fix it ??
>>>
>>> Kunal Bali
>>> Research Scholar
>>> Radio & Atmospheric Science Division
>>> CSIR - National Physical Laboratory
>>> New Delhi - 110012
>>>
>>>
>>>
>>>
>>>
>>>
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>>
>
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