get_rasters: Retrieve and organize spatial environmental information.
In gabrielhoc/MapinguariLegacy: Tools for process-based biogeographical analysis

Description Usage Arguments Value Examples

get_rasters returns an organized list of environmental rasters.

get_rasters(raster_source = NULL, ext = c(-180, 180, -60, 90),
  margin = 0, resolution = 10, non_fixed_var = NULL,
  fixed_var = NULL, years = "present", scenarios = NULL,
  baseline = "present", separator = "_", projection_model = "MP",
  reorder = FALSE, download_source = "pkg-raster", alert = NULL)

`raster_source`	character or list of RasterStack. You can either input a path to a folder with the required rasters or a list of RasterStack organized by year/scenario.
`ext`	numeric vector or dataframe with coordinates. Extension to crop rasters. Input can be either a vector with limiting latitudes and longitudes or a table of coordinates. In case the input is a numeric vector, the order of values should be: western most longitude, easter most longitude, southern most latitude then northern most latitude. Longitude values west of GMT and latitude values south of equator are distinguished by a negative sign. In case the input is a table of coordinates, the points further in each direction will determine the extent for cropping.
`margin`	numeric. Additional distance to be added to margin of extent, in degrees.
`resolution`	numeric. Spatial resolution of rasters, in degrees. This is used for downloading only.
`non_fixed_var`	character vector. Names of the time varying variables to be outputed. This variables will be subject to variation according to argument 'years'.
`fixed_var`	character vector. Names of the time fixed variables to be outputed. This variables will not be subject to variation according to argument 'years'.
`years`	character vector. Names of years for time varying variables.
`scenarios`	character vector. Names of future scenarios to for time varying variables.
`baseline`	character vector. Names of years not subject to scenarios.
`separator`	character. Character that separates variable names, years and scenarios.
`projection_model`	character. Projection model for future variables. Must be any model accepted in `raster::getData`
`reorder`	logical. If TRUE, will use last two characters of layer names in RasterStacks with 12 layers to order them in ascending order.
`download_source`	character. Where to download rasters from. Default is 'pkg-raster' which will get rasters from WorldClim, using package 'raster' functions.
`alert`	integer. Plays a sound alert when function is done running. See documentation of package beepr for description of sound options.

Returns a list of raster stacks for the variables required, organized by year/scenario combination.

# Fulanus_Ecorasters_download <-
#   get_rasters(
#     ext = FulanusDistribution,
#     margin = 5,
#     non_fixed_var = c('prec', 'tmin', 'tmax'),
#     years = c("present", '2050', '2070'),
#     scenarios = c('rcp26', 'rcp45', 'rcp85'),
#     alert = 6)

Fulanus_Ecorasters_dir <-
  get_rasters(
    raster_source = "/Users/gabriel/Documents/Mapinguari/global_grids_10_minutes",
    ext = FulanusDistribution,
    margin = 5,
    non_fixed_var = c('prec', 'tmin', 'tmax'),
    fixed_var = "alt",
    years = c("present", '2050', '2070'),
    scenarios = c('rcp26', 'rcp45', 'rcp85'),
    reorder = TRUE,
    alert = 4)