install sf from GitHub source in MacOsX

In terminal. You must have MacBrew installed. If not, use:

Install macbrew via:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Then

brew install proj

brew install gdal

brew install geos

sudo R

Then in R:

library("devtools")

install_github("r-spatial/sf", build_opts = c("--with-proj-include=/usr/local/include", 

                                              "--with-proj-lib=/usr/local/lib"), force=TRUE)


And...

> packageVersion("sf")

[1] ‘0.9.9’

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