Have a look at
?mapproject
When you use a projection with map(), you subsequently have to transform your lat/long
coordinates to conform to the projection.
HTH
Ray Brownrigg
On 8/04/2011 6:11 a.m., Jaimin Dave wrote:
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<macque...@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<davejaim...@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
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and provide commented, minimal, self-contained, reproducible code.
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and provide commented, minimal, self-contained, reproducible code.
