Map inside-outside

Description

Determine if strokes are in a target region

Usage

KINOUT(MAP, LLlim, projtype = 2)

Arguments

Details

The limits are used to calculate an origin and each point is projected accordingly. The x-y values are evaluated for being in or out of the target. A local projection is used - UTM (2) is the prefered projection.

Value

Vector or indeces of strokes that intersect the target.

Note

The mercator projections do not work well with this routine.

Author(s)

Jonathan M. Lees<jonathan.lees@unc.edu>

See Also

inpoly,

Examples

library(geomapdata)
data(worldmap)
data(coastmap)
L = list(lon=c(163.59, 182.95), lat=c(-48.998, -32.446))


k = KINOUT(worldmap,L, 2)

###  which strokes are these?

 print( worldmap$STROKES$nam[k] )


k = KINOUT(coastmap,L, 2)

 print( coastmap$STROKES$nam[k] )


testmap =  GEOmap.Extract(coastmap,k, INOUT="in" )

 plotGEOmap(testmap)