Re: [R] Projecting data on a world map using long/lat
Hi Patrick, Thanks! That worked perfectly! M -- View this message in context: http://r.789695.n4.nabble.com/Projecting-data-on-a-world-map-using-long-lat-tp3081298p3085834.html Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] Projecting data on a world map using long/lat
Hi Mathijs, this should work: library(maptools) library(ggplot2) gpclibPermit() theme_set(theme_bw()) #setwd(C:\\foo) point to your local dir # Data: http://thematicmapping.org/downloads/world_borders.php world.shp - readShapeSpatial(TM_WORLD_BORDERS-0.3.shp) # check for region-id - Use FIPS head(world@data) ## see licence, not GPL world.shp.p - fortify.SpatialPolygonsDataFrame(world.shp, region=FIPS) world - merge(world.shp.p, world.shp, by.x=id, by.y=FIPS) head(world) dim(world) # only the worldmap p - ggplot(data=world, aes(x=long, y=lat, group=group)) + geom_polygon(fill=#63D1F4) p - p + geom_path(color=white) + coord_equal() ggsave(p, width=11.69, height=8.27, file=world_map.jpg) ## Add some locations cities - read.table(textConnection( longlat city pop -58.381944 -34.599722 'Buenos Aires' 11548541 14.25 40.83 Neapel 962940), header = TRUE) p1 - p + geom_point(data = cities, aes(group = NULL), shape=5, color='black') ggsave(p1, width=11.69, height=8.27, file=world_map_2.jpg) Regards, Patrick Am 10.12.2010 17:53, schrieb mathijsdevaan: Thanks for the suggestions, but I am not there yet (I'm a real novice). In the code provided by Patrick (see below), I changed the shape input (from sids to world) which I downloaded here: http://thematicmapping.org/downloads/world_borders.php. As a result I also need to change the CNTY_ID and id in the code, but I have no idea what to put there. Could you please help me? Thanks! Mathijs library(maptools) library(ggplot2) gpclibPermit() myshp- readShapeSpatial(system.file(shapes/sids.shp, package=maptools)) ## see licence, not GPL myshp.points- fortify.SpatialPolygonsDataFrame(myshp, region=CNTY_ID) shpm- merge(myshp.points, myshp, by.x=id, by.y=CNTY_ID) head(shpm) p- ggplot(shpm, aes(long, lat, group=group, fill=NWBIR74)) p- p + geom_polygon() + geom_path(color=white) + coord_equal() ## Add some locations cities- read.table(textConnection( longlat city val -78.644722 35.818889 Raleigh 323 -80.84 35.226944 Charlotte 510 -82.555833 35.58 Asheville400), header = TRUE) p- p + geom_point(aes( fill=NULL, group = NULL, size=val), data = cities, color= 'black') p __ 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.
Re: [R] Projecting data on a world map using long/lat
On Fri, Dec 10, 2010 at 2:21 AM, mathijsdevaan mathijsdev...@gmail.com wrote: Hi, I have a dataset (CSV) with some counts of firms located around the globe. Each count is assigned to the longitude and latitude of the specific location. Now I want to plot these counts on a world map using dots (size of dots represent the count). I have been unable to find any info on whether this is possible and if so, how? Can you please help me? Thanks! Plotting points is trivial - plot(data$x,data$y,pch=19,cex=data$size) will do for a start. i'm guessing your real problem is when you say 'on a world map'. How detailed a world map do you need? There's an outline one in the 'maps' package, or you should be able to find a shapefile of the world on the web somewhere and use that via the rgdal package. Other options include making a KML file of your points and overlaying on google earth. Or getting google map tiles and overlaying on that Or exporting your data to a GIS format and doing the pretty map in something like Quantum GIS. What are you trying to do exactly? also, you might want to post to r-sig-geo Barry __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] Projecting data on a world map using long/lat
Oh, whoops I was looking for the vote up button and accidentally hit Reply All. On Fri, Dec 10, 2010 at 8:25 PM, Barry Rowlingson b.rowling...@lancaster.ac.uk wrote: On Fri, Dec 10, 2010 at 2:21 AM, mathijsdevaan mathijsdev...@gmail.com wrote: Hi, I have a dataset (CSV) with some counts of firms located around the globe. Each count is assigned to the longitude and latitude of the specific location. Now I want to plot these counts on a world map using dots (size of dots represent the count). I have been unable to find any info on whether this is possible and if so, how? Can you please help me? Thanks! Plotting points is trivial - plot(data$x,data$y,pch=19,cex=data$size) will do for a start. i'm guessing your real problem is when you say 'on a world map'. How detailed a world map do you need? There's an outline one in the 'maps' package, or you should be able to find a shapefile of the world on the web somewhere and use that via the rgdal package. Other options include making a KML file of your points and overlaying on google earth. Or getting google map tiles and overlaying on that Or exporting your data to a GIS format and doing the pretty map in something like Quantum GIS. What are you trying to do exactly? also, you might want to post to r-sig-geo Barry __ 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. -- Michael Sumner Institute for Marine and Antarctic Studies, University of Tasmania Hobart, Australia e-mail: mdsum...@gmail.com __ 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.
Re: [R] Projecting data on a world map using long/lat
Thanks for the suggestions, but I am not there yet (I'm a real novice). In the code provided by Patrick (see below), I changed the shape input (from sids to world) which I downloaded here: http://thematicmapping.org/downloads/world_borders.php. As a result I also need to change the CNTY_ID and id in the code, but I have no idea what to put there. Could you please help me? Thanks! Mathijs library(maptools) library(ggplot2) gpclibPermit() myshp- readShapeSpatial(system.file(shapes/sids.shp, package=maptools)) ## see licence, not GPL myshp.points- fortify.SpatialPolygonsDataFrame(myshp, region=CNTY_ID) shpm- merge(myshp.points, myshp, by.x=id, by.y=CNTY_ID) head(shpm) p - ggplot(shpm, aes(long, lat, group=group, fill=NWBIR74)) p - p + geom_polygon() + geom_path(color=white) + coord_equal() ## Add some locations cities - read.table(textConnection( longlat city val -78.644722 35.818889 Raleigh 323 -80.84 35.226944 Charlotte 510 -82.555833 35.58 Asheville400), header = TRUE) p - p + geom_point(aes( fill=NULL, group = NULL, size=val), data = cities, color= 'black') p -- View this message in context: http://r.789695.n4.nabble.com/Projecting-data-on-a-world-map-using-long-lat-tp3081298p3082305.html Sent from the R help mailing list archive at Nabble.com. __ 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.
[R] Projecting data on a world map using long/lat
Hi, I have a dataset (CSV) with some counts of firms located around the globe. Each count is assigned to the longitude and latitude of the specific location. Now I want to plot these counts on a world map using dots (size of dots represent the count). I have been unable to find any info on whether this is possible and if so, how? Can you please help me? Thanks! Mathijs -- View this message in context: http://r.789695.n4.nabble.com/Projecting-data-on-a-world-map-using-long-lat-tp3081298p3081298.html Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] Projecting data on a world map using long/lat
The symbols function can add circles to an existing plot with the diameter based on another variable. You may need to project points if you draw a map with a projection. -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- project.org] On Behalf Of mathijsdevaan Sent: Thursday, December 09, 2010 7:21 PM To: r-help@r-project.org Subject: [R] Projecting data on a world map using long/lat Hi, I have a dataset (CSV) with some counts of firms located around the globe. Each count is assigned to the longitude and latitude of the specific location. Now I want to plot these counts on a world map using dots (size of dots represent the count). I have been unable to find any info on whether this is possible and if so, how? Can you please help me? Thanks! Mathijs -- View this message in context: http://r.789695.n4.nabble.com/Projecting- data-on-a-world-map-using-long-lat-tp3081298p3081298.html Sent from the R help mailing list archive at Nabble.com. __ 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. __ 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.
