[ncl-talk] CylindricalEqualArea map projection problems

[Marc Michelsen]

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 
> <mailto: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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