How can one control the color of lines with
plot(SpatialPolygonsDataFrame)?
Adding lwd=9 to the arguments for plot produces black borders so wide
most of the red disappears:
map(xlim=c(10, 90), ylim=c(30, 60))
library(raster)
ct <- getData("countries")
plot(subset(ct, NAME %in% c("Azerbaijan", "Uzbekistan", "Tajikistan",
"Turkmenistan", "Croatia")),
add=TRUE, col='red', lwd=9)
A related question is how can I see the plot function used here?
Methods dispatch does not take this to plot.default nor to
plot.SpatialPolygonsDataFrame, as it would with an S3 method.
Thanks,
Spencer
#########################
Thanks to Gilles Leduc, Greg Snow, Thomas Adams, Barry
Rowlingson, and Michael Sumner for their replies. For the archives, in
case someone else might find this in the archives, I will record here
two solutions to my problem.
1. Michael's reply was the simplest, especially since it worked
with "map" adding "add=TRUE" and "col" to the plot:
map(xlim=c(10, 90), ylim=c(30, 60))
library(raster)
ct <- getData("countries")
plot(subset(ct, NAME %in% c("Azerbaijan", "Uzbekistan", "Tajikistan",
"Turkmenistan", "Croatia")),
add=TRUE, col='red')
2. Before I saw Michael's reply, I had solved the problem with
much greater effort: (1) I downloaded a zip file for each country from
"www.diva-gis.org/datadown", as suggested by Gilles. (2) Unzipping
produced folders with names like "..\TWN_adm" and files with names
beginning "TWN_adm0", "TWN_adm1", and "TWN_adm2" and extensions bdf,
prj, sbn, sbx, shp, and shx. I could then get what I wanted with code
like the following:
Taiwan0 <- readShapeSpatial("..\TWN_adm0")
map(xlim=c(100, 150), ylim=c(10, 30))
plot(Taiwan0, add=TRUE, col='blue', lwd=3, fill=FALSE)
Again, thanks for the replies.
On 7/1/2014 4:38 PM, Michael Sumner wrote:
An example:
library(raster)
ct <- getData("countries")
plot(subset(ct, NAME %in% c("Azerbaijan", "Uzbekistan", "Tajikistan",
"Turkmenistan", "Croatia"))
On Wed, Jul 2, 2014 at 9:09 AM, Michael Sumner <mdsum...@gmail.com> wrote:
On Wed, Jul 2, 2014 at 7:56 AM, Thomas Adams <tea...@gmail.com> wrote:
Spencer,
Maybe I'm not sure what you're asking but here
http://www.gadm.org/version1
are current shapefiles by country. The highlighting (selection) canals be
done in GRASS GIS, QGIS, GMT
raster::getData can read this. See here http://www.gadm.org/ and
library(raster)
?getData
Tom
On Tue, Jul 1, 2014 at 2:29 PM, Spencer Graves <
spencer.gra...@prodsyse.com>
wrote:
What would you suggest I do to create a world map highlighting
Taiwan and post-Soviet states like Azerbaijan, Uzbekistan, Tajikistan,
Turkmenistan, and Croatia?
The region argument in maps::map won't recognize any of these, and
my literature search identified hundreds of packages with some spatial /
geographical / mapping content.
Thanks,
Spencer Graves
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Michael Sumner
Software and Database Engineer
Australian Antarctic Division
Hobart, Australia
e-mail: mdsum...@gmail.com
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