vapour_warp_raster_raw: type safe(r) raster warp

In vapour: Access to the 'Geospatial Data Abstraction Library' ('GDAL')

type safe(r) raster warp

Description

These wrappers around vapour_warp_raster() guarantee single vector output of the nominated type.

Usage

vapour_warp_raster_raw(
  x,
  bands = NULL,
  extent = NULL,
  dimension = NULL,
  projection = "",
  set_na = TRUE,
  source_projection = NULL,
  source_extent = 0,
  resample = "near",
  silent = TRUE,
  ...,
  warp_options = "",
  transformation_options = "",
  open_options = "",
  options = ""
)

vapour_warp_raster_int(
  x,
  bands = NULL,
  extent = NULL,
  dimension = NULL,
  projection = "",
  set_na = TRUE,
  source_projection = NULL,
  source_extent = 0,
  resample = "near",
  silent = TRUE,
  ...,
  warp_options = "",
  transformation_options = "",
  open_options = "",
  options = ""
)

vapour_warp_raster_dbl(
  x,
  bands = NULL,
  extent = NULL,
  dimension = NULL,
  projection = "",
  set_na = TRUE,
  source_projection = NULL,
  source_extent = 0,
  resample = "near",
  silent = TRUE,
  ...,
  warp_options = "",
  transformation_options = "",
  open_options = "",
  options = ""
)

vapour_warp_raster_chr(
  x,
  bands = NULL,
  extent = NULL,
  dimension = NULL,
  projection = "",
  set_na = TRUE,
  source_projection = NULL,
  source_extent = 0,
  resample = "near",
  silent = TRUE,
  ...,
  warp_options = "",
  transformation_options = "",
  open_options = "",
  options = ""
)

vapour_warp_raster_hex(
  x,
  bands = NULL,
  extent = NULL,
  dimension = NULL,
  projection = "",
  set_na = TRUE,
  source_projection = NULL,
  source_extent = 0,
  resample = "near",
  silent = TRUE,
  ...,
  warp_options = "",
  transformation_options = "",
  open_options = "",
  options = ""
)

Arguments

x	vector of data source names (file name or URL or database connection string)
bands	index of band/s to read (1-based), may be new order or replicated, or NULL (all bands used, the default)
extent	extent of the target warped raster 'c(xmin, xmax, ymin, ymax)'
dimension	dimensions in pixels of the warped raster (x, y)
projection	projection of warped raster (in Well-Known-Text, or any projection string accepted by GDAL)
set_na	NOT IMPLEMENTED logical, should 'NODATA' values be set to NA
source_projection	optional, override or augment the projection of the source (in Well-Known-Text, or any projection string accepted by GDAL)
source_extent	extent of the source raster, used to override/augment incorrect source metadata
resample	resampling method used (see details in vapour_read_raster)
silent	TRUE by default, set to FALSE to report messages
...	unused
warp_options	character vector of options, as in gdalwarp -wo - see Details
transformation_options	character vector of options, as in gdalwarp -to see Details
open_options	character vector of options, as in gdalwarp -oo - see Details
options	character vectors of options as per the gdalwarp command line

Details

_hex and _chr are aliases of each other.

Value

atomic vector of the nominated type raw, int, dbl, or character (hex)

Examples

b <- 4e5
f <- system.file("extdata", "sst.tif", package = "vapour")
prj <- "+proj=aeqd +lon_0=147 +lat_0=-42"
bytes <- vapour_warp_raster_raw(f, extent = c(-b, b, -b, b),
                             dimension = c(18, 2),
                             bands = 1, 
                             projection = prj)
# not useful given source type floating point, but works
str(bytes)

vapour documentation built on June 22, 2024, 10:01 a.m.