Re: Annotation on map

Hi Mary

This was a simplified example. I actually what to place a bunch of wind
roses on a map, but with my first attempt they were all coming in the
wrong place! I think I understand what I need to do, but don't quite know
how to do it.

Many thanks, Andrea

On 5/24/12 4:49 PM, "Mary Haley" <haley@ucar.edu> wrote:

>Hi Andrea,
>
>I think part of the problem is your setting for amParallelPosF and
>amOrthogonalPosF. These are supposed to be small values, like 0.5 or -0.5
>to move stuff away from the center of the plot.
>
>When you use gsn_add_annotation to attach an object to plot, the default
>is that the object gets attached to the center of the plot. So, I think
>that since your center is already at 15E, 55N,
>then hopefully you shouldn't need amParallelPosF and amOrthogonalPosF at
>all.
>
>If all you are trying to do is attach a text string, can you use
>gsn_add_text?
>
>--Mary
>
>On May 24, 2012, at 5:17 AM, Andrea N. Hahmann wrote:
>
>> Good morning (to most of you),
>>
>> I have a problem locating an annotation on a map. In the attached
>>script I make a simple map whose center is near 15.E 55.N. Then, I try
>>to locate an annotation at these coordinates:
>>
>> datatondc(base_map,15.,55.,x_out,y_out)
>> print(x_out+" "+y_out)
>> amres@amParallelPosF = x_out
>> amres@amOrthogonalPosF = y_out
>> amres@amJust = "CenterCenter"
>> annoid = gsn_add_annotation(base_map, txid, amres) ; Attach string
>>to plot
>>
>> First of all x_out and y_out are not near the center (0.,0.) and the
>>string ends up at the lower left corner of the map. I am probably doing
>>something wrong, but I don't know what it is.
>>
>> Thanks,
>> Andrea
>> ----
>> Andrea N. Hahmann
>> Senior Scientist
>> DTU Wind Energy
>>
>> Technical University of Denmark
>> Risø Campus
>> Frederikborgvej 399, P.O. Box 49
>> 4000 Roskilde, Denmark
>>
>> Direct +45 4677 5471
>> Mobil: +45 2133 0550
>> ahah@dtu.dk
>> http://www.vindenergi.dtu.dk/
>>
>> <TestMap.ncl><Map.pdf>_______________________________________________
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Received on Thu May 24 09:03:48 2012