##
## Evaluates the effect of Ramer - Douglas - Peucker on simplifying tracks
##
## DRME nov 04 - 2012
## dmiranda(at)uis(dot)edu(dot)co
##
## libraries
##
#library(maptools)
#library(rgeos)
#library(nnclust)
#library(shapefiles)
##
## functions
##
#graph_mst <- function (l) {
# distrib<-l@lines[[1]]@Lines[1][[1]]@coords
# mst<-mst(l@lines[[1]]@Lines[1][[1]]@coords)
# plot(l, col="white");title("MST")
# segments(distrib[mst$from,1], distrib[mst$from,2], distrib[mst$to,1],distrib[mst$to,2],col="red")
#}
#graph_simpl <- function (m, tol) {
# l<-(gSimplify(m,tol=tol))
# plot(l);title(c("tol = ",tol))
# graph_mst(l)
#}
## data
# n= l = readWKT("LINESTRING(0 7,1 6,2 1,3 4,4 1,5 7,6 6,7 4,8 6,9 4)")
# par(mfrow=c(3,2))
# plot(l);title("Original")
# graph_mst(l)
# graph_simpl(n,1)
# graph_simpl(n,2)
# graph_simpl(n,4)
# graph_simpl(n,6)
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