Re: Draw contour map on a bigger map

Hi Adam,

thanks, this works perfect and next time i press the correct button for reply to all ;-)!

Now i have another little question.

Instead of drawing this contour on the map
is it possible to draw this area with a maybe with a
darker/lighter color (or a little bit opaque)?

Cheers,
Ronny

Am 05.12.2012 um 00:11 schrieb Adam Phillips:

> Hi Ronny,
> Thank you for sending an easy-to-run script along with the datafile, as this makes diagnosing what is wrong much easier. Note though: In the future please respond to ncl-talk, as that way everyone can read your reply, and possibly respond with an answer..
>
> Are you receiving the same error messages I am receiving upon running your script?:
> (0) check_for_y_lat_coord: Warning: Data either does not contain a valid latitude coordinate array or doesn't contain one at all.
> (0) A valid latitude coordinate array should have a 'units' attribute equal to one of the following values:
> (0) 'degrees_north' 'degrees-north' 'degree_north' 'degrees north' 'degrees_N' 'Degrees_north' 'degree_N' 'degreeN' 'degreesN' 'deg north'
> (0) check_for_lon_coord: Warning: Data either does not contain a valid longitude coordinate array or doesn't contain one at all.
> (0) A valid longitude coordinate array should have a 'units' attribute equal to one of the following values:
> (0) 'degrees_east' 'degrees-east' 'degree_east' 'degrees east' 'degrees_E' 'Degrees_east' 'degree_E' 'degreeE' 'degreesE' 'deg east'
>
> If you are, then the error messages are telling you exactly what is wrong: Your latitude/longitude arrays do not have valid units attributes. I added these two lines to your script:
> fsd&rlat@units = "degrees_north" ; was "degrees"
> fsd&rlon@units = "degrees_east"
>
> Once I set those two lines I received another error message, warning me that the data is not cyclic and to set gsnAddCyclic = False:
> (0) gsn_add_cyclic: Warning: The range of your longitude data is not 360.
> (0) You may want to set gsnAddCyclic to False to avoid a warning
> (0) message from the spline function.
> warning:_NhlCreateSplineCoordApprox: Attempt to create spline approximation for X axis failed: consider adjusting trXTensionF value
> warning:IrTransInitialize: error creating spline approximation for trXCoordPoints; defaulting to linear
>
> I then added res@gsnAddCyclic = False, and the resulting plot looks like what I think you want. (attached)
> Please let ncl-talk know if this does not resolve your issue.
> Best regards,
> Adam
>
>
>
> On 12/4/12 3:47 PM, Ronny Berndt wrote:
>> Hi Adam,
>>
>> i have attached the script with an example ncl.
>>
>> i set your variables to
>> res@mpMinLatF = -50.
>> res@mpMaxLatF = 10.
>> res@mpMinLonF = -10.
>> res@mpMaxLonF = 50.
>> res@mpCenterLonF = (res@mpMaxLonF+res@mpMinLonF)/2.
>>
>> But the full map is colored. it should be only colored
>> from lat ~21S to ~-10S and lon ~10E to lon ~25E and the rest of the map
>> should be only the countrys and water and so on...
>>
>> Do i have to make to maps and overlay them, or is
>> there and easier solution?
>>
>> Cheers,
>> Ronny
>>
>
> <native.png>

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Received on Wed Dec 5 08:34:46 2012