[R] ggmap (or ggplot2 with mapping question)

[Roy Mendelssohn - NOAA Federal]

Thanks.  The map specs are  stored in myMap, it can be displayed just by typing at the prompt:

myMap

 Thanks for the geom.rect suggestion.  I will look at that.

-Roy
On Dec 26, 2014, at 4:16 PM, David Winsemius <dwinsemius at comcast.net> wrote:

> 
>> On Dec 26, 2014, at 3:26 PM, Roy Mendelssohn - NOAA Federal <roy.mendelssohn at noaa.gov> wrote:
>> 
>> HI All:
>> 
>> Okay I am feeling particular brain dead today.  i have the following map created so far using ggmap:
>> 
>>> library(ggmap)
>>> myLocation <- c(-178, -28, -72, 48)
>>> myMap <- get_map(location=myLocation, source="google", maptype="satellite", crop=FALSE)
>>> 
> 
> All if get is a matrix. No map.
> 
> 
>> 
>> 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)
>> 
> 
> That looks more like a specification for geom.rect than for geom_polygon.
> 
> 
>> 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 eom_polygon.
> 
> If it were used for eom_polygon I would imagine you need to put it in the form pairs (x,y)
> 
> subbox<-list(x=c(-130,-125,-125,-130,-130),y=c( 20,20,25, 25,20))
> 
> Just a guess mind, you.
> 
> — 
> David.
>> 
>> Thanks for any help.
>> 
>> -Roy
>> 
>> 
>> **********************
>> "The contents of this message do not reflect any position of the U.S. Government or NOAA."
>> **********************
>> Roy Mendelssohn
>> Supervisory Operations Research Analyst
>> NOAA/NMFS
> 
> 
> 

**********************
"The contents of this message do not reflect any position of the U.S. Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
***Note new address and phone***
110 Shaffer Road
Santa Cruz, CA 95060
Phone: (831)-420-3666
Fax: (831) 420-3980
e-mail: Roy.Mendelssohn at noaa.gov www: http://www.pfeg.noaa.gov/

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