[R] plotting points over a map using R

[Ista Zahn]

The ggmap package
(http://journal.r-project.org/archive/2013-1/kahle-wickham.pdf) is
also quite good.

Best,
Ista

On Fri, Jan 31, 2014 at 6:23 AM, Mohammed Ouassou
<mohammed.ouassou at statkart.no> wrote:
> library(RgoogleMaps);   # download a static map from the Google server
> library(geomapdata);    # Topographic and Geologic Mapping
> lbrary(PBSmapping);     # Draw Maps and Implement Other GIS Procedures
>
> STEP1:
> my_map = GetMap(center=my_center, zoom =my_zoom ,
>                 destfile=my_out_file ,maptype = "mapmaker-hybrid",
>                 size=c(640,640));
>
> ?GetMap for more info
>
> STEP2: You can add text
> =========================
> tmp = TextOnStaticMap(my_map,lat = my_markers_1[,"lat"],
>                         lon = my_markers_1[,"lon"],
>                         labels=as.character(site_names),
>                         col="red", cex=1.1, add=F)
>
> # STEP 3: you can add points
> tmp = PlotOnStaticMap(my_map,lat = my_markers[,"lat"],
>                 lon = my_markers[,"lon"], cex=2.,pch=10,col=c("black"),
>                 add=T)
> add=T is importent
>
> # STEP 4: You can add lines
> tmp = PlotOnStaticMap(my_map,lat = my_markers_2[,"lat"], lon =
>                 my_markers_2[,"lon"], col=c("blueviolet"), add=T,
>                 FUN = lines, lwd = 3);
>
>
> I hope will help !
>
>
> Mohammed
>
>
>
>
> On Fri, 2014-01-31 at 09:58 +0000, 李德磊 wrote:
>> Hello everyone,
>> I have no idea how to plotting points over a map using R, in which the colors of the points stand for the points' value. I'd like to get a map as shown in attachment picture which was plotted using matlab. Does anyone know how to do it using R?  Thank you very much for your help in advance.
>> Kind regards,Dli
>> ______________________________________________ R-help at 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 at 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.