save_spatial_objects: Save spatial objects

In RQGIS: Integrating R with QGIS

Description

The function saves spatial objects (sp, sf and raster) to a temporary folder on the computer's hard drive.

Usage

save_spatial_objects(params, type_name, NA_flag = -99999)

Arguments

params	A parameter-argument list as returned by pass_args().
type_name	A character string containing the QGIS parameter type for each parameter (boolean, multipleinput, extent, number, etc.) of params. The Python method RQGIS.get_args_man() returns a Python dictionary with one of its elements corresponding to the type_name (see also the example section).
NA_flag	Value used for NAs when exporting raster objects.

Author(s)

Jannes Muenchow

Examples

## Not run: 
library("RQGIS")
library("raster")
library("reticulate")
r <- raster(ncol = 100, nrow = 100)
r1 <- crop(r, extent(-10, 11, -10, 11))
r2 <- crop(r, extent(0, 20, 0, 20))
r3 <- crop(r, extent(9, 30, 9, 30))
r1[] <- 1:ncell(r1)
r2[] <- 1:ncell(r2)
r3[] <- 1:ncell(r3)
alg <- "grass7:r.patch"
out <- py_run_string(sprintf("out = RQGIS.get_args_man('%s')", alg))$out
params <- get_args_man(alg)
params$input <- list(r1, r2, r3)
params[] <- save_spatial_objects(params = params,
                                 type_name = out$type_name)

## End(Not run)

RQGIS documentation built on May 2, 2019, 8:23 a.m.