Re: Map tickmarks on regional cylindrical equidistant contour plot

Thanks, Jatin. That certainly works (see attached), though it's not clear
to me why it should...

However, it does lose the "spherical" look of the original plot, which I
found quite pleasing, and which ties in nicely with the look of polar
stereographic projections. I wonder if the add_map_tickmarks function could
be amended to work on CE plots? - it states that this function works only
on rectangular projections, but I'm not sure which those might be.

Thanks for your help.

-- 
Tess Parker
PhD Candidate
School of Mathematical Sciences
Room 225, Building 28
Monash University, Clayton VIC 3800
Phone: +61 3 9905 4458
On 29 October 2013 14:36, Jatin Kala <jatin.kala.jk@gmail.com> wrote:
> I think the problem is coming from:
> res@mpCenterLatF         = 30.
>
> If you comment it out, the plot looks like one would expect. Same if you
> set it to zero (the default value). I agree that setting it to 30 "makes
> sense" in this case and is the intuitive thing to do, especially when the
> code warns you in this case, if you do not set the mpCenterLon value.
>
> Cheers,
> Jatin.
>
> On 29/10/2013, at 1:37 PM, Teresa Parker wrote:
>
> > When doing a cylindrical equidistant plot of contours over a regional
> map, using mpMaxLatF etc. commands, the lat/lon tickmarks are evenly spaced
> around the borders of the plot. They do not, however, correspond to the
> exact positions of the map gridlines, as the projection is curved over a
> plot of about 160 deg lon and 60 deg lat in extent. I have attached a
> simple script, which requires no external data files, and the resulting
> plot.
> >
> > The script mptick_9.ncl gives a function, "add_map_tickmarks", which
> allows the explicit indication of where to place tickmarks on a map.
> However, the add_map_tickmarks function does not apparently work on
> cylindrical equidistant (the default) maps. Any ideas for placing the
> tickmarks correctly, so that a plot with gridlines will have tickmarks in
> the right place, as per the result of mptick_9.ncl for a different map
> projection?
> >
> > Thanks for any assistance you can offer.
> >
> > --
> > Tess Parker
> > PhD Candidate
> > School of Mathematical Sciences
> > Room 225, Building 28
> > Monash University, Clayton VIC 3800
> > Phone: +61 3 9905 4458
> >
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>

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