Package 'wince'

Title: Write NetCDF Files for the Obvious Situations
Description: Create a 3D 'NetCDF' with time or depth as the third dimension, and convention-conforming coordinate system metadata. Eventually we'll set this up to write slice by slice which is easy once the file is instantiated, but atm it's purely an experiment. We might include capability to create 4D ones too.
Authors: Michael D. Sumner [aut, cre]
Maintainer: Michael D. Sumner <[email protected]>
License: MIT + file LICENSE
Version: 0.0.0.9002
Built: 2024-11-14 04:13:52 UTC
Source: https://github.com/hypertidy/wince

Help Index

Add grid mapping

Description

grid_mapping by CF convention

Usage

add_grid_mapping(x, mapping, overwrite = FALSE)

Arguments

x

file name
mapping

list of name of variable and attributes for mapping params (see DEtails)
overwrite

enforce user override to actually update the file

Details

mapping is a list with elements 'name' of the crs variable, and 'atts' list with named attributes and values (e.g. standard_parallel = c(10, 20))

Value

the name of the file modified, returned invisibly

Examples

mapping <- list(name = "crs",
                   atts = list(grid_mapping_name = "lambert_conformal_conic",
                               standard_parallel = c(-10, -50),
                               #standard_parallel = -50,
                               latitude_of_projection_origin = -30,
                               longitude_of_central_meridian =  134.33,
                               semi_major_axis = 6370000))

Create raster file in NetCDF.

Description

Rasters need extent, dimension, projection - this writer gives the correct metadata for simple raster inputs with minimal generality and no fuss.

Usage

write_nc(
  data,
  filename = NULL,
  extent = NULL,
  title = "raster",
  zvar = NULL,
  z_type = NULL,
  data_name = NULL,
  data_unit = "some.unit",
  long_name = "some.long.name",
  params = "",
  overwrite = FALSE
)

Arguments

filename

the NetCDF file to create
title

name of the model
zvar

actual time steps, need to be regularly space
overwrite

set to TRUE to clobber an existing file
transp_params

optional details to put in the NetCDF notes

Details

These functions aim to minimize the amount of manual handling of details, creating an NetCDF file that can be modified directly.

Value

the filename of the output (use ncdf4 to inspect, modify it)

Examples

png <- system.file("textures/world.png", package = "rgl", mustWork = TRUE)
arr <- aperm(png::readPNG(png), c(2, 1, 3))
arr <- arr[,ncol(arr):1, ]
f <- write_nc(arr, extent = c(-180, 180, -90, 90), data_name = "world_image")
# terra::plotRGB(terra::rast(f) * 256)
# maps::map(add = T)