[ncl-talk] CylindricalEqualArea map projection problems

[Mary Haley]

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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