Hi,
I tried it using abline but it is not showing any o/p(i.e no grids are
formed on map). I did following :

 map('state','new york',proj='azequalarea',orient=c(42.5,-74.56,0))
 abline(h=seq(41, 44, length=3))
 abline(v=seq(-79, -76, length=3))

I also tried using map.grid() but in some cases it is dividing into exact 4
quadrants.

On Wed, Apr 6, 2011 at 2:49 PM, MacQueen, Don <macqueen1@llnl.gov> wrote:

> Possibly something similar to
>
>  abline(v=seq(long.min, long.max, length=3)
>  abline(h=seq(lat.min, lat.max, length=3)
>
> ?
>
> The above will add vertical and horizontal lines to an existing plot, and
> assumes that the plot is in long/lat coordinates. Of course, this ignores
> the fact that long/lat is not a cartesian coordinate system.
>
> (can't provide more detail without more information)
>
> -Don
>
> --
> Don MacQueen
>
> Lawrence Livermore National Laboratory
> 7000 East Ave., L-627
> Livermore, CA 94550
> 925-423-1062
>
>
>
>
>
> -----Original Message-----
> From: Jaimin Dave <davejaiminm@gmail.com>
> Date: Mon, 4 Apr 2011 18:39:45 -0700
> To: "r-help@r-project.org" <r-help@r-project.org>
> Subject: [R] Grid on Map
>
> >I am new to R.I want to draw grid from a csv file which contains latitude
> >minimum ,latitude maximum ,longitude minimum ,longitude maximum.The grid
> >should be divided into exactly 4 quadrants. The map is of NY state of
> >USA. I
> >want to know how can I do it.
> >Help would be appreciated.
> >
> >Thanks
> >Jaimin
> >
> >    [[alternative HTML version deleted]]
> >
> >______________________________________________
> >R-help@r-project.org mailing list
> >https://stat.ethz.ch/mailman/listinfo/r-help
> >PLEASE do read the posting guide
> >http://www.R-project.org/posting-guide.html
> >and provide commented, minimal, self-contained, reproducible code.
>
>

	[[alternative HTML version deleted]]

