[ncl-talk] CylindricalEqualArea map projection problems

[Adam Phillips]

Hi Marc,
Try also setting:
res at mpLimitMode = "LatLon"
I think that setting is implied when using the cylindrical equidistant
project, but is needed to use the mp*LatF resources for other projections..
Adam

On Tue, Mar 13, 2018 at 9:26 AM, Marc Michelsen <marc at u.washington.edu>
wrote:

> Hi Mary,
>
> Thank you, that fixed the tickmarks and labels, but what about the min and
> max latitude?
> It's still rendered from -90 to 90 despite setting
> res at mpMinLatF = -45.
> res at mpMaxLatF = 45.
>
> Thanks,
> Marc
>
> On 3/13/2018 7:15 AM, Mary Haley wrote:
>
> Hi Marc,
>
> The simple solution is to set:
>
>   res at pmTickMarkDisplayMode = "Always"
>
> ​The longish explanation is that it used to be that you couldn't get map
> tickmark labels at all, so for C.E. plots, we created some special code to
> explicitly add labels. This is what you see in the original plot.  We
> didn't do this for other map projections because we knew that eventually
> the internal code would be enhanced to get labels for other map
> projections. This internal code only gets activated by the "​pmTickMarkDisplayMode"
> resource, which is a Plot Manager resource that if you give it a value of
> "Always", it will force the map tickmarks to be added. We haven't made this
> the default yet because the internal code is not really complete. I think
> at some point we may just turn this on and make it the default.
>
> --Mary
>
>
>
>
>
>
>
> On Sat, Mar 10, 2018 at 8:45 AM, Marc Michelsen <marc at u.washington.edu>
> wrote:
>
>> Hi NCLers,
>>
>> When I use the CylindricalEquidistant map projection it looks great:
>>
>> 3414 olympus% cat maponly.ncl
>> begin
>>   wks  = gsn_open_wks("png","maponly")
>>   res                        = True
>>   res at mpOceanFillColor       = "cyan"
>>   res at mpLandFillColor        = "sienna"
>>   res at mpInlandWaterFillColor = "cyan"
>>   res at mpProjection = "CylindricalEquidistant"
>> ;  res at mpProjection = "CylindricalEqualArea"
>>   res at mpMinLatF = -45.
>>   res at mpMaxLatF = 45.
>>   plot = gsn_csm_map(wks,res)
>>   delete(wks)
>>   system("convert -trim maponly.png maponly.png")
>>   end
>> 3415 olympus% ncl < maponly.ncl
>>  Copyright (C) 1995-2017 - All Rights Reserved
>>  University Corporation for Atmospheric Research
>>  NCAR Command Language Version 6.4.0
>>  The use of this software is governed by a License Agreement.
>>  See http://www.ncl.ucar.edu/ for more details.
>> 3416 olympus%
>>
>>
>>
>> However if I switch to
>> res at mpProjection = "CylindricalEqualArea"
>> I get this:
>>
>>
>>
>> i.e. no tickmarks, no lat/lon labels and the min max latitude are not
>> respected. Is this a bug or am I missing something?
>>
>> Thanks,
>>
>> Marc
>>
>>
>>
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>
>
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-- 
Adam Phillips
Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
www.cgd.ucar.edu/staff/asphilli/   303-497-1726

<http://www.cgd.ucar.edu/staff/asphilli>
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