makeGridTopology: Generate a GridTopology from a Spatial object

In mdsumner/trip: Tracking Data

Generate a GridTopology from a Spatial object

Description

Sensible defaults are assumed, to match the extents of data to a manageable grid.

Usage

makeGridTopology(
  obj,
  cells.dim = c(100, 100),
  xlim = NULL,
  ylim = NULL,
  buffer = 0,
  cellsize = NULL,
  adjust2longlat = FALSE
)

Arguments

obj	any Spatial object, or other object for which bbox will work
cells.dim	the number of cells of the grid, x then y
xlim	x limits of the grid
ylim	y limits of the grid
buffer	proportional size of the buffer to add to the grid limits
cellsize	pixel cell size
adjust2longlat	assume cell size is in kilometres and provide simple adjustment for earth-radius cells at the north-south centre of the grid

Details

Approximations for kilometres in longlat can be made using cellsize and adjust2longlat.

Value

S4 class GridTopology with properties set variously from input parameters

mdsumner/trip documentation built on July 10, 2024, 6:46 a.m.