classGrid: Spatial parameters of raster images.

In nplatonov/ursa: Non-Interactive Spatial Tools for Raster Processing and Visualization

Spatial parameters of raster images.

Description

Class ursaGrid is a part of class ursaRaster. It defines spatial locations of image.

Usage

## S3 method for class 'ursaGrid'
print(x, ...)

## S3 method for class 'ursaGrid'
str(object, ...)

## S3 method for class 'ursaGrid'
dim(x)

## S3 method for class 'ursaGrid'
as.data.frame(x, row.names = NULL, optional = FALSE, ...)

Arguments

x	ursaGrid object in functions print, dim and as.data.frmame.
object	ursaGrid object in function str.
row.names	Ignored. Argument, which is passed to generic function as.data.frame.
optional	Ignored. Argument, which is passed to generic function as.data.frame.
...	Further arguments passed to generic functions as.data.frame, print, and str.

Details

The blank ursaGrid object is generated by calling of ursa_grid() without arguments. These approaches provide unified sequence of list's items:

List of 9
 $ columns: int NA
 $ rows   : int NA
 $ resx   : num NA
 $ resy   : num NA
 $ minx   : num NA
 $ maxx   : num NA
 $ miny   : num NA
 $ maxy   : num NA
 $ proj4  : chr ""
 - attr(*, "class")= chr "ursaGrid"
NULL

Value

Object of class ursaGrid is a list with items:

columns	Number of columns (samples)
rows	Number of rows (lines)
resx	Grid cell size by horizontal axis
resy	Grid cell size by vertical axis
minx	Left margin of boundary box
maxx	Right margin of boundary box
miny	Bottom margin of boundary box
maxy	Top margin of boundary box
proj4	PROJ.4 string

Function dim for object of class ursaGrid returns named vector of length 2: number of rows ("lines") and number of elements in a row ("samples")

Author(s)

Nikita Platonov [e-mail]

See Also

regrid, session_grid

Examples

session_grid(NULL)
print(methods(class="ursaGrid"))

a <- pixelsize()
g <- ursa_grid(a)
print(is.ursa(a,"grid"))
print(is.ursa(g,"grid"))
print(g)

nplatonov/ursa documentation built on May 8, 2024, 6:02 p.m.