ursa (version 3.8.8)

ursa_grid: Extract and assign spatial paramaters of raster images.

Description

Raster image (ursaRaster) contains embedded spatial parameters (ursaGrid) in item $grid. These functions manipulate with item $grid.

Usage

ursa_grid(obj)
ursa_grid(obj) <- value
ursa_ncol(obj)
ursa_nrow(obj)
ursa_columns(obj)
ursa_rows(obj)
ursa_samples(obj)
ursa_lines(obj)
ursa_extent(obj)
ursa_bbox(obj)

Arguments

obj

ursaRaster object. For ursa_grid function list of ursaRaster objects is allowed

value

ursaGrid object

Value

ursa_grid return value of $grid item of ursaRaster object.

ursa_grid<- return ursaRaster with modified $grid item.

ursa_ncol, ursa_columns, ursa_samples return integer of length 1.

ursa_nrow, ursa_rows, ursa_lines return integer of length 1.

ursa_extent, ursa_bbox return numeric of length 4 (xmin, ymin, xmax, ymax).

Details

ursa_grid<- may used to minor corrections of spatial parameters. Howevert, it seems that this function is not claimed in practice.

ursa_ncol, ursa_columns, ursa_samples are synonyms for extracting number of columns/samples.

ursa_nrow, ursa_rows, ursa_lines are synonyms for extracting number of rows/lines.

ursa_extent, ursa_bbox, are synonyms for extracting boundary box (spatial extent).

Examples

# NOT RUN {
session_grid(NULL)
a <- pixelsize()
print(ursa_grid(a))
ursa_grid(a)$proj4 <- gsub("\\.0+","",ursa_grid(a)$proj4)
print(ursa_grid(a))
# }