[R] ggmap (or ggplot2 with mapping question)
Roy Mendelssohn - NOAA Federal
roy.mendelssohn at noaa.gov
Sat Dec 27 00:26:16 CET 2014
Okay I am feeling particular brain dead today. i have the following map created so far using ggmap:
> myLocation <- c(-178, -28, -72, 48)
> myMap <- get_map(location=myLocation, source="google", maptype="satellite", crop=FALSE)
I want to color in some lat-lon 5 degree boxes based on some criterion, and it look like this could be done use geom_polygon if I can figure out how to get the data in the format required for geom_polygon. To simplify the problem, suppose i have a bounding box:
subbox<-c(-130, 20, -125, 25)
and I want to color that box red on myMap defined above. To put this in context, I actually have 360 squares which have been clustered by some criteria, and I want to color them all based on the cluster number of the box. but if I can figure out how to do the simple problem above I can extend it to the more general problem.
Basically the question is how can I get that simple box information into the format required for geom_polygon.
Thanks for any help.
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