extensionLine: extensionLine

In geozoning: Zoning Methods for Spatial Data

Description

extensionLine

Usage

extensionLine(contourL = NULL, step = NULL, bdSP, superLines)

Arguments

contourL	contour line
step	grid step as returned by calStep
bdSP	list, contains x and y coordinates of map boundaries
superLines	object returned by superLines(bdSP)

Details

closes contour lines by extending them to their interesection with the map border

Value

a list

Examples

data(mapTest)
step=mapTest$step
xsize=mapTest$xsize
ysize=mapTest$ysize
cL=contourLines(seq(step, xsize-step, by=step),seq(step, ysize-step, by=step),
               mapTest$krigGrid, levels = c(5,7))
plot(mapTest$boundary,type="l",col="red")
lines(cL[[1]])#contour line is not closed
lines(geozoning:::extensionLine(cL[[1]],step,sp::SpatialPoints(mapTest$boundary),
     geozoning:::superLines(mapTest$boundary)),col="red") #contour line is closed

geozoning documentation built on May 2, 2019, 9:43 a.m.