OCNet (version 1.2.2)

create_peano: Create Peano network

Description

Function that creates Peano networks on a square lattice.

Usage

create_peano(nIterPeano, outletPos = "NE", xllcorner = 1,
  yllcorner = 1, cellsize = 1)

Value

A river object that contains the same objects as those produced by create_OCN. As such, it can be used as input for all other complementary functions of the package.

Arguments

nIterPeano

Number of iteration of the Peano scheme. The resulting network will span a domain of size 2^(nIterPeano + 1) by 2^(nIterPeano + 1).

outletPos

Corner where the outlet is located, expressed as intercardinal direction. Possible values are "NE", "SE", "SW", "NW".

xllcorner

X coordinate of the lower-left pixel (expressed in planar units).

yllcorner

Y coordinate of the lower-left pixel (expressed in planar units).

cellsize

Size of a pixel (expressed in planar units).

Examples

# 1) create a peano network in a 32x32 square,
# use landscape_OCN, aggregate_OCN functions,
# and display subcatchment map and map of drainage area
peano <- create_peano(4)
peano <- aggregate_OCN(landscape_OCN(peano), thrA = 4)
old.par <- par(no.readonly = TRUE)
par(mfrow=c(1,3))
draw_simple_OCN(peano)
title("Peano network")
draw_subcatchments_OCN(peano)
title("Subcatchments")
draw_thematic_OCN(peano$RN$A, peano)
title("Drainage area at RN level")
par(old.par)