Re: [R] another question on shapefiles and geom_point in ggplot2
Hi all Just as Pierre pointed out, i used rgeos instead of gpclib (the licence is less restrictive even though i'm still students). A since the last release the rgeos package seems to work well. I'm really disapointed by the fact that some packages (e.g adehabitatMA which is great thank's M. Calenge) still use gpclib and don't offer the possibility to switch to rgeos, and is really messy to have two package to do the same task and with the same function name in the path (eg when i use adehabitatMA and maptools). Manuel: May be you should use the *colour* aesthetic instead of* *the* fill *one* *in the call of *geom_path*. Something like that : p = ggplot(geo, aes(x, y)) p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() + scale_size(name = Número de especies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número de especies', colours = heat.colors(10), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) + geom_path(aes(x=long,y=lat, group=group, *colour=id* ),data=fortify.ai_biotica) not tested, so i'm not really sure about this one 2011/4/4 Pierre Roudier pierre.roud...@gmail.com Hi all, 2011/4/4 Felipe Carrillo mazatlanmex...@yahoo.com: Manuel: As far as I know one needs gpclibPermit() in order to fortify see this: Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() I am going to guess that ahmadou dicko doesn't show gpclibPermit() on his code because he loaded it with Rprofile or some other way. I tried to run his code without gpclibPermit() and it wouldn't let me fortify, so not sure how he did it. On that specific point, Colin Arundel and Roger Bivant released the rgeos package on CRAN a few days [1]. This is a great achievement as it brings bindings to the GEOS C++ lib [2] - long story short, it makes the job the non-free [3] gpclib used to do. In its later release, maptools has an option to check if rgeos if present - if it is the case it is used instead of gpclib: library(maptools) Loading required package: foreign Loading required package: sp Loading required package: lattice Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() Checking rgeos availability as gpclib substitute: TRUE ?gpclibPermit Pierre [1] http://cran.r-project.org/web/packages/rgeos/ [2] http://trac.osgeo.org/geos/ [3] https://stat.ethz.ch/pipermail/r-sig-geo/2010-January/007400.html -- Scientist Landcare Research, New Zealand -- You received this message because you are subscribed to the ggplot2 mailing list. Please provide a reproducible example: http://gist.github.com/270442 To post: email ggpl...@googlegroups.com To unsubscribe: email ggplot2+unsubscr...@googlegroups.com More options: http://groups.google.com/group/ggplot2 [[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.
Re: [R] another question on shapefiles and geom_point in ggplot2
Thank you Ahmadou, I got an error when I change fill to colour: p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() + + scale_size(to = c(3, 15), name = Número de especies, breaks = c(10, 40, 70, 100, 130, 160, 190, 220, 250)) + + scale_colour_gradientn(name = 'Número de especies', colours = heat.colors(9), breaks = c(10, 40, 70, 100, 130, 160, 190, 220, 250)) + xlab(Longitud) + ylab(Latitud) + + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) + + geom_path(aes(x=long,y=lat,group=group, colour=id),data=fortify.ai_biotica) Error: Non-continuous variable supplied to scale_colour_gradientn. Best, Manuel On 04/04/2011 03:37 a.m., ahmadou dicko wrote: Hi all Just as Pierre pointed out, i used rgeos instead of gpclib (the licence is less restrictive even though i'm still students). A since the last release the rgeos package seems to work well. I'm really disapointed by the fact that some packages (e.g adehabitatMA which is great thank's M. Calenge) still use gpclib and don't offer the possibility to switch to rgeos, and is really messy to have two package to do the same task and with the same function name in the path (eg when i use adehabitatMA and maptools). Manuel: May be you should use the *colour* aesthetic instead of**the*fill *one**in the call of *geom_path*. Something like that : p = ggplot(geo, aes(x, y)) p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() + scale_size(name = Número de especies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número de especies', colours = heat.colors(10), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) + geom_path(aes(x=long,y=lat, group=group, *colour=id*),data=fortify.ai_biotica) not tested, so i'm not really sure about this one 2011/4/4 Pierre Roudier pierre.roud...@gmail.com mailto:pierre.roud...@gmail.com Hi all, 2011/4/4 Felipe Carrillo mazatlanmex...@yahoo.com mailto:mazatlanmex...@yahoo.com: Manuel: As far as I know one needs gpclibPermit() in order to fortify see this: Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() I am going to guess that ahmadou dicko doesn't show gpclibPermit() on his code because he loaded it with Rprofile or some other way. I tried to run his code without gpclibPermit() and it wouldn't let me fortify, so not sure how he did it. On that specific point, Colin Arundel and Roger Bivant released the rgeos package on CRAN a few days [1]. This is a great achievement as it brings bindings to the GEOS C++ lib [2] - long story short, it makes the job the non-free [3] gpclib used to do. In its later release, maptools has an option to check if rgeos if present - if it is the case it is used instead of gpclib: library(maptools) Loading required package: foreign Loading required package: sp Loading required package: lattice Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() Checking rgeos availability as gpclib substitute: TRUE ?gpclibPermit Pierre [1] http://cran.r-project.org/web/packages/rgeos/ [2] http://trac.osgeo.org/geos/ [3] https://stat.ethz.ch/pipermail/r-sig-geo/2010-January/007400.html -- Scientist Landcare Research, New Zealand -- You received this message because you are subscribed to the ggplot2 mailing list. Please provide a reproducible example: http://gist.github.com/270442 To post: email ggpl...@googlegroups.com mailto:ggpl...@googlegroups.com To unsubscribe: email ggplot2+unsubscr...@googlegroups.com mailto:ggplot2%2bunsubscr...@googlegroups.com More options: http://groups.google.com/group/ggplot2 -- *Manuel Spínola, Ph.D.* Instituto Internacional en Conservación y Manejo de Vida Silvestre Universidad Nacional Apartado 1350-3000 Heredia COSTA RICA mspin...@una.ac.cr mspinol...@gmail.com Teléfono: (506) 2277-3598 Fax: (506) 2237-7036 Personal website: Lobito de río https://sites.google.com/site/lobitoderio/ Institutional website: ICOMVIS http://www.icomvis.una.ac.cr/ [[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,
Re: [R] another question on shapefiles and geom_point in ggplot2
Manuel: I changed your variable names from x to 'long' and y to 'lat' on the riqueza_out.csv file. The code below should do what you want. Also, since the legend title is kind of long, I broke it down into three lines so you can see more plot area. I am cc'ing the other groups so more people use it if needed. library(rgdal) library(ggplot2) library(sp) library(maptools) gpclibPermit() manuel - readOGR(dsn=., layer=AI_BIOTICA_010411_CRTM05) names(manuel);dim(manuel) slotNames(manuel) # look at the slot names # add the 'id' variable to the shapefile and use it to merge both files manuel@data$id = rownames(manuel@data) # convert shapefile to dataframe manuel.df - as.data.frame(manuel) # fortify to plot with ggplot2 manuel_fort - fortify(manuel,region=id) head(manuel_fort) # Merge shapefile and the as.dataframe shapefile manuel_merged - join(manuel_fort,manuel.df, by =id) head(manuel_merged) # Read in the csv file manuel_points - read.csv(riqueza_out.csv) head(manuel_points);dim(manuel_points) # fortify this one too for the points or else an error will ocurr manuel_points - fortify(manuel_points) manuel_points # Plot the shapefile and overlayed the points over it p - ggplot(manuel_merged, aes(long,lat,group=group)) + geom_polygon(aes(data=manuel_merged,fill=Area_Influ)) + geom_path(color=white) + theme_bw() # remove this if you don't want black and white background p + geom_point(data=manuel_points,aes(size=ACE,colour=ACE,group=NULL)) + scale_size(name = Número\nde\nespecies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número\nde\nespecies', colours = rainbow(6), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Sent: Sat, April 2, 2011 11:22:24 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 No problem, thank you very much Felipe. Best, Manuel On 03/04/2011 12:19 a.m., Felipe Carrillo wrote: I meant to send you this one..Let me clean up the code a little bit and I will send it to you,,,do you mind if I send it to you in the morning? Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Sent: Sat, April 2, 2011 11:15:28 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 Yes Felipe. That is the graph I was looking for. I got something closer but no like yours. How did you do it? Manuel On 03/04/2011 12:10 a.m., Felipe Carrillo wrote: I was able to open them,,I am attaching a picture of the graph I created..It's that what you had in mind? Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Sent: Sat, April 2, 2011 10:35:51 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 It should be. I am sending them again. Manuel On 02/04/2011 10:23 p.m., Felipe Carrillo wrote: Manuel: I can't open the shapefile, is this the original one? Is the csv file the one that you are trying to overlay on top of the shapefile? Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Sent: Sat, April 2, 2011 6:14:09 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 Files attached. On 02/04/2011 07:04 p.m., Felipe Carrillo wrote: If you want individual points overlayed on the shapefile, you need to add another variable to it before you fortify it. After you fortify merge both the fortified dataset and the original shapefile. Go ahead and post your shapefile to see if I can figure it out. Do you just want the points or want text also? Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Sent: Sat, April 2, 2011 5:24:02 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 Hi Felipe, I did the same thing that I am trying know, attached is how it looks. Best, Manuel On 02/04/2011 06:09 p.m., Felipe Carrillo wrote: Manuel: I did something
Re: [R] another question on shapefiles and geom_point in ggplot2
Thank you very much Felipe, Did you see the solution from ahmadou dicko? He doesn´t use gpclibPermit() I have another option but I cannot get the right fill for the id. See attached map. ai_biotica = readOGR(dsn=C:/ProyectosRespacial/ICE/SIG_Biotica_PHED, layer=AI_BIOTICA_010411_CRTM05) str(ai_biotica) # fortify to get the data fortify.ai_biotica - fortify.SpatialPolygonsDataFrame(ai_biotica,region='Area_Influ') names(fortify.ai_biotica) str(fortify.ai_biotica) levels(fortify.ai_biotica$group) # mapa ggplot(fortify.ai_biotica, aes(x = long, y=lat, group = group)) + geom_polygon(colour = black, fill = NA) geo = read.csv(riqueza_out.csv, sep = ,, header = T) names(geo) str(geo) summary(geo) # mapa con riqueza p = ggplot(geo, aes(x, y)) p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() + scale_size(name = Número de especies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número de especies', colours = heat.colors(10), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) + geom_path(aes(x=long,y=lat,group=group, fill=id),data=fortify.ai_biotica) Best, Manuel On 03/04/2011 01:41 p.m., Felipe Carrillo wrote: Manuel: I changed your variable names from x to 'long' and y to 'lat' on the riqueza_out.csv file. The code below should do what you want. Also, since the legend title is kind of long, I broke it down into three lines so you can see more plot area. I am cc'ing the other groups so more people use it if needed. library(rgdal) library(ggplot2) library(sp) library(maptools) gpclibPermit() manuel - readOGR(dsn=., layer=AI_BIOTICA_010411_CRTM05) names(manuel);dim(manuel) slotNames(manuel) # look at the slot names # add the 'id' variable to the shapefile and use it to merge both files manuel@data$id mailto:manuel@data$id = rownames(manuel@data mailto:manuel@data) # convert shapefile to dataframe manuel.df - as.data.frame(manuel) # fortify to plot with ggplot2 manuel_fort - fortify(manuel,region=id) head(manuel_fort) # Merge shapefile and the as.dataframe shapefile manuel_merged - join(manuel_fort,manuel.df, by =id) head(manuel_merged) # Read in the csv file manuel_points - read.csv(riqueza_out.csv) head(manuel_points);dim(manuel_points) # fortify this one too for the points or else an error will ocurr manuel_points - fortify(manuel_points) manuel_points # Plot the shapefile and overlayed the points over it p - ggplot(manuel_merged, aes(long,lat,group=group)) + geom_polygon(aes(data=manuel_merged,fill=Area_Influ)) + geom_path(color=white) + theme_bw() # remove this if you don't want black and white background p + geom_point(data=manuel_points,aes(size=ACE,colour=ACE,group=NULL)) + scale_size(name = Número\nde\nespecies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número\nde\nespecies', colours = rainbow(6), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx *From:* Manuel Spínola mspinol...@gmail.com *To:* Felipe Carrillo mazatlanmex...@yahoo.com *Sent:* Sat, April 2, 2011 11:22:24 PM *Subject:* Re: another question on shapefiles and geom_point in ggplot2 No problem, thank you very much Felipe. Best, Manuel On 03/04/2011 12:19 a.m., Felipe Carrillo wrote: I meant to send you this one..Let me clean up the code a little bit and I will send it to you,,,do you mind if I send it to you in the morning? Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx *From:* Manuel Spínola mspinol...@gmail.com *To:* Felipe Carrillo mazatlanmex...@yahoo.com *Sent:* Sat, April 2, 2011 11:15:28 PM *Subject:* Re: another question on shapefiles and geom_point in ggplot2 Yes Felipe. That is the graph I was looking for. I got something closer but no like yours. How did you do it? Manuel On 03/04/2011 12:10 a.m., Felipe Carrillo wrote: I was able to open them,,I am attaching a picture of the graph I created..It's that what you had in mind? Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx *From:* Manuel Spínola mspinol...@gmail.com *To:* Felipe Carrillo mazatlanmex...@yahoo.com
Re: [R] another question on shapefiles and geom_point in ggplot2
Manuel: As far as I know one needs gpclibPermit() in order to fortify see this: Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() I am going to guess that ahmadou dicko doesn't show gpclibPermit() on his code because he loaded it with Rprofile or some other way. I tried to run his code without gpclibPermit() and it wouldn't let me fortify, so not sure how he did it. On the same note, your code didn't work when you were trying to join ai_biotica and ai_biotica@data because you are trying to join polygons and points (just a guess). Try to use fortify instead of fortify.SpatialPolygonsDataFrame. I tested with a different shapefile and it works for me. manuel@data$id = rownames(manuel@data) manuel_fort - fortify(manuel,region=id) manuel_merged - join(manuel_fort,manuel@data, by =id) Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Cc: r-h...@stat.math.ethz.ch; ggpl...@googlegroups.com Sent: Sun, April 3, 2011 1:51:02 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 Thank you very much Felipe, Did you see the solution from ahmadou dicko? He doesn´t use gpclibPermit() I have another option but I cannot get the right fill for the id. See attached map. ai_biotica = readOGR(dsn=C:/ProyectosRespacial/ICE/SIG_Biotica_PHED, layer=AI_BIOTICA_010411_CRTM05) str(ai_biotica) # fortify to get the data fortify.ai_biotica - fortify.SpatialPolygonsDataFrame(ai_biotica,region='Area_Influ') names(fortify.ai_biotica) str(fortify.ai_biotica) levels(fortify.ai_biotica$group) # mapa ggplot(fortify.ai_biotica, aes(x = long, y=lat, group = group)) + geom_polygon(colour = black, fill = NA) geo = read.csv(riqueza_out.csv, sep = ,, header = T) names(geo) str(geo) summary(geo) # mapa con riqueza p = ggplot(geo, aes(x, y)) p + geom_point(aes(size = ACE, colour = ACE)) + theme_bw() + scale_size(name = Número de especies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número de especies', colours = heat.colors(10), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) + geom_path(aes(x=long,y=lat,group=group, fill=id),data=fortify.ai_biotica) Best, Manuel On 03/04/2011 01:41 p.m., Felipe Carrillo wrote: Manuel: I changed your variable names from x to 'long' and y to 'lat' on the riqueza_out.csv file. The code below should do what you want. Also, since the legend title is kind of long, I broke it down into three lines so you can see more plot area. I am cc'ing the other groups so more people use it if needed. library(rgdal) library(ggplot2) library(sp) library(maptools) gpclibPermit() manuel - readOGR(dsn=., layer=AI_BIOTICA_010411_CRTM05) names(manuel);dim(manuel) slotNames(manuel) # look at the slot names # add the 'id' variable to the shapefile and use it to merge both files manuel@data$id = rownames(manuel@data) # convert shapefile to dataframe manuel.df - as.data.frame(manuel) # fortify to plot with ggplot2 manuel_fort - fortify(manuel,region=id) head(manuel_fort) # Merge shapefile and the as.dataframe shapefile manuel_merged - join(manuel_fort,manuel.df, by =id) head(manuel_merged) # Read in the csv file manuel_points - read.csv(riqueza_out.csv) head(manuel_points);dim(manuel_points) # fortify this one too for the points or else an error will ocurr manuel_points - fortify(manuel_points) manuel_points # Plot the shapefile and overlayed the points over it p - ggplot(manuel_merged, aes(long,lat,group=group)) + geom_polygon(aes(data=manuel_merged,fill=Area_Influ)) + geom_path(color=white) + theme_bw() # remove this if you don't want black and white background p + geom_point(data=manuel_points,aes(size=ACE,colour=ACE,group=NULL)) + scale_size(name = Número\nde\nespecies, breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20)) + scale_colour_gradientn(name = 'Número\nde\nespecies', colours = rainbow(6), breaks = c(2, 4, 6, 8, 10, 12, 14, 16, 18, 20))+ xlab(Longitud) + ylab(Latitud) + opts(axis.text.x = theme_text(size = 8, vjust = 1)) + opts(axis.text.y = theme_text(size = 8, hjust = 1)) Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish Wildlife Service California, USA http://www.fws.gov/redbluff/rbdd_jsmp.aspx From: Manuel Spínola mspinol...@gmail.com To: Felipe Carrillo mazatlanmex...@yahoo.com Sent: Sat, April 2, 2011 11:22:24 PM Subject: Re: another question on shapefiles and geom_point in ggplot2 No problem, thank you very much Felipe. Best, Manuel On 03/04/2011 12:19 a.m.,
Re: [R] another question on shapefiles and geom_point in ggplot2
Hi all, 2011/4/4 Felipe Carrillo mazatlanmex...@yahoo.com: Manuel: As far as I know one needs gpclibPermit() in order to fortify see this: Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() I am going to guess that ahmadou dicko doesn't show gpclibPermit() on his code because he loaded it with Rprofile or some other way. I tried to run his code without gpclibPermit() and it wouldn't let me fortify, so not sure how he did it. On that specific point, Colin Arundel and Roger Bivant released the rgeos package on CRAN a few days [1]. This is a great achievement as it brings bindings to the GEOS C++ lib [2] - long story short, it makes the job the non-free [3] gpclib used to do. In its later release, maptools has an option to check if rgeos if present - if it is the case it is used instead of gpclib: library(maptools) Loading required package: foreign Loading required package: sp Loading required package: lattice Note: polygon geometry computations in maptools depend on the package gpclib, which has a restricted licence. It is disabled by default; to enable gpclib, type gpclibPermit() Checking rgeos availability as gpclib substitute: TRUE ?gpclibPermit Pierre [1] http://cran.r-project.org/web/packages/rgeos/ [2] http://trac.osgeo.org/geos/ [3] https://stat.ethz.ch/pipermail/r-sig-geo/2010-January/007400.html -- Scientist Landcare Research, New Zealand __ 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.
