setgrid: Produce a grid over an area

Description Usage Arguments Value Note See Also

View source: R/setgrid.R

Description

Produce a grid over an area, possibly interactively.

Usage

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setgrid(lat, lon = 0, type = "p", pch = "*", xlim = c(0, 0),
  ylim = c(0, 0), b0 = 65, r = 1.1, country = geo::island,
  xlab = "default", ylab = "default", option = "cut", reg = 0,
  dx = c(0, 0), nx = c(0, 0), grpkt = 0, scale = "km", find = F,
  new = F, grid = T, projection = "Mercator", n = 2500, b1 = b0,
  nholes = 0)

Arguments

lat

Latitude

lon

Longitude, if not included in lat

type

Plot type

pch

Plot character

xlim,ylim

Limits for plot

b0

Base latitude

r

Range expansion

country

Country plotted

xlab,ylab

Labels for x and y axes

option

Method for determining plotted area extent, default "cut" (to the range of the data)

reg

Region to be gridded, can be set interactively

dx

Resolution in each direction (?)

nx

Number of gridpoints in each direction (?)

grpkt

Gridpoints can also be supplied to the function for plotting (??????????)

scale

Projection scale (general geo default is "km")

find

Should the gridpoints within reg be determined?

new

Plot control argument ?

grid

Draw grid (which grid?)

projection

Projection to use

n

Number of gridpoints (?)

b1

Second latitude for the Lambert projection

nholes

number of holes to be sent to geodefine when setting out the region to be gridded

Value

List of components:

grpt

Gridpoints

reg

Region over which the grid was laid

find

Was find = TRUE?

xgr

If find = TRUE the gridpoints within region reg is also returned.

Note

Needs elaboration, check use of find = TRUE

See Also

Calls a number of functions, i.e. geodefine, geoplot, geopoints, gridpoints, inside, selectedpar


geo documentation built on May 29, 2017, 5:36 p.m.