In dis-organization/rgdalwinhdf4: Read 'HDF4' on Windows

knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
  out.width = "100%"
)

rgdalwinhdf4

The goal of rgdalwinhdf4 is to read HDF4 on Windows, using Appveyor. It works on both 32-bit and 64-bit, relying on Rtools being available, and the rforge/rgdal clone source with the rwinlibs/gdal2 (>= 2.2.3) tooling.

Installation

Until rgdal is on CRAN with version (> 1.2-16) you will need devtools and the Rtools set up on Windows.

(Untested, see this repo appveyor set up for ).

devtools::install_github("rforge/rgdal/pkg")
devtools::install_github("dis-organization/rgdalwinhdf4")

There's a nice HDF4 sea ice data set for testing with.

## install.packages(c("viridis", "raster", "maptools"))
library(rgdalwinhdf4)
x <- read_hdf4()
## system.file("extdata/asi-AMSR2-s6250-20171211-v5.hdf", package = "rgdalwinhdf4")
library(raster)
r <- flip(raster(x), "y")
extent(r) <- extent(-3950000, 3950000, -3950000, 4350000)
projection(r) <- "+proj=stere +lat_0=-90 +lat_ts=-70 +lon_0=0 +k=1 +x_0=0 +y_0=0 +a=6378273 +b=6356889.449 +units=m +no_defs"
plot(r, col = viridis::viridis(100))
data("wrld_simpl", package = "maptools")
plot(sp::spTransform(wrld_simpl, projection(r)), add = TRUE)
print(r)