[ncl-talk] gc_latlon

[Md. Jalal Uddin]

Thank you, sir. It works fine (Katrina_circle.ncl), but for many storms,
confused me. Could I have your kind suggestion for many cyclones?

On Mon, Mar 18, 2019 at 11:16 PM Dennis Shea <shea at ucar.edu> wrote:

> As noted by Soma:  a nice function
>
>
> *https://www.ncl.ucar.edu/Document/Functions/Contributed/geolocation_circle.shtml*
> <https://www.ncl.ucar.edu/Document/Functions/Contributed/geolocation_circle.shtml>
>
> *Available in version 6.5.0
> <https://www.ncl.ucar.edu/prev_releases.shtml#6.5.0> and later.*
>
>
> *https://www.ncl.ucar.edu/Applications/polyg.shtml
> <https://www.ncl.ucar.edu/Applications/polyg.shtml>*
>
> *Examples 24 & 25*
>
> *Y*ou can specify 500km as your 'circle radius'.
> Use in conjunction with* gc_inout
> <https://www.ncl.ucar.edu/Document/Functions/Built-in/gc_inout.shtml> t*o
> mask data inside a great circle.
> ========
>
> The following was created prior to the introduction of
> *geolocation_circle*. It offers an alternative approach:
>
>
> *https://www.ncl.ucar.edu/Applications/mask.shtml
> <https://www.ncl.ucar.edu/Applications/mask.shtml>*
>
> *Example:  Katrina_circle.ncl*
>
> On Mon, Mar 18, 2019 at 1:49 AM Md. Jalal Uddin <dmjalal90 at gmail.com>
> wrote:
>
>> I want to show the rainfall only within 500 km. Please look at the
>> picture (within the circle).
>>
>> [image: jan.png]
>>
>> On Mon, Mar 18, 2019 at 3:35 PM Soma Roy <somaroy892 at gmail.com> wrote:
>>
>>> Try to use geolocation circle and based on that cut out the inner values
>>> by using mask option as available in ncl pages.
>>>
>>> Hope this idea help you...
>>>
>>> Cheers,
>>> Soma
>>>
>>> On Mon, Mar 18, 2019, 12:59 Md. Jalal Uddin <dmjalal90 at gmail.com wrote:
>>>
>>>> Hi all,
>>>> I wanted to extract rainfall within 500 km from certain lat and lon. I
>>>> am not getting the right one. any suggestions?
>>>>
>>>> f  = addfile("jan500.nc", "r")
>>>>  prc =f->pre(:,{75:100},{0:30})
>>>>  lon = f->longitude
>>>>  lat =f->latitude
>>>>  prc_reorder = prc(time|:,latitude|:,longitude|:)
>>>>
>>>>  prc_reorder&latitude = lat
>>>>  prc_reorder&longitude = lon
>>>>
>>>> lat1 =(/5.5/)
>>>> lon1 = (/87.0/)
>>>>
>>>> do i = 0,dimsizes(lat)-1
>>>>       do j = 0,dimsizes(lon)-1
>>>>       if gc_latlon(lat1,lon1,i,j,2,4) .lt.500 then
>>>>           prc_reorder(:,i,j) =  prc_reorder(:,i,j)
>>>>               end if
>>>>       end do
>>>>  end do
>>>> ;;;;
>>>> Jalal
>>>> --
>>>> *Md. Jalal Uddin*
>>>> MSc in Applied Meteorology (English Language)
>>>> Nanjing University of Information, Science and Technology, China
>>>> B.Sc. in Disaster Management (Hons.)
>>>> Patuakhali Science and Technology University, Bangladesh.
>>>> Cell: +8613260859092, +8801792052662
>>>> Web: www.dmjalal90.weebly.com
>>>> Facebook: jalal.hossen.39
>>>> LinkedIn: https://bd.linkedin.com/in/md-jalal-uddin-80a026b0
>>>> Twitter: dmjalal90
>>>> Skype: dmjalal90
>>>> _______________________________________________
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>>>>
>>>
>>
>> --
>> *Md. Jalal Uddin*
>> MSc in Applied Meteorology (English Language)
>> Nanjing University of Information, Science and Technology, China
>> B.Sc. in Disaster Management (Hons.)
>> Patuakhali Science and Technology University, Bangladesh.
>> Cell: +8613260859092, +8801792052662
>> Web: www.dmjalal90.weebly.com
>> Facebook: jalal.hossen.39
>> LinkedIn: https://bd.linkedin.com/in/md-jalal-uddin-80a026b0
>> Twitter: dmjalal90
>> Skype: dmjalal90
>> _______________________________________________
>> ncl-talk mailing list
>> ncl-talk at ucar.edu
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>

-- 
*Md. Jalal Uddin*
MSc in Applied Meteorology (English Language)
Nanjing University of Information, Science and Technology, China
B.Sc. in Disaster Management (Hons.)
Patuakhali Science and Technology University, Bangladesh.
Cell: +8613260859092, +8801792052662
Web: www.dmjalal90.weebly.com
Facebook: jalal.hossen.39
LinkedIn: https://bd.linkedin.com/in/md-jalal-uddin-80a026b0
Twitter: dmjalal90
Skype: dmjalal90
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