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library(rgdal)
library(maptools)
library(RColorBrewer)
library(classInt)
library(OpasnetBaseUtils)
shp<-readOGR('PG:host=localhost user=postgres dbname=spatial_db','kuopio_house')
plotvar<-shp@data$ika
nclr<-8
plotclr<-brewer.pal(nclr,"BuPu")
class<-classIntervals(plotvar,nclr,style="quantile")
colcode<-findColours(class,plotclr)
epsg4326String <- CRS("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs")
proj4string(shp)<-("+init=epsg:3067")
shp2<-spTransform(shp,epsg4326String)
kmlname<-"Kuopio house data"
kmldescription<-"Random stuff about here"
icon<-"http://maps.google.com/mapfiles/kml/pal2/icon18.png"
name<-paste("ika value: ", shp2$ika)
description <- paste("<b>Value:</b>",shp2$ika,"<br><b>Description:</b>",shp2$kayttotark)
MyPointKML<-function(obj = NULL, kmlname = "", kmldescription = "", name = NULL, description = "", icon = "http://maps.google.com/mapfiles/kml/pal4/icon24.png",col=NULL)
{
if (is.null(obj))
return(list(header = c("<?xml version=\"1.0\" encoding=\"UTF-8\"?>",
"<kml xmlns=\"http://earth.google.com/kml/2.2\">",
"<Document>", paste("<name>", kmlname, "</name>",
sep = ""), paste("<description><![CDATA[", kmldescription,
"]]></description>", sep = "")), footer = c("</Document>",
"</kml>")))
if (class(obj) != "SpatialPointsDataFrame")
stop("obj must be of class 'SpatialPointsDataFrame' [package 'sp']")
if (is.null(name)) {
name = c()
for (i in 1:nrow(obj)) name <- append(name, paste("site",
i))
}
if (length(name) < nrow(obj)) {
if (length(name) > 1)
warning("kmlPoints: length(name) does not match nrow(obj). The first name will be replicated.")
name <- rep(name, nrow(obj))
}
if (length(description) < nrow(obj)) {
if (length(description) > 1)
warning("kmlPoints: length(description) does not match nrow(obj). The first description will be replicated.")
description <- rep(description, nrow(obj))
}
if (length(icon) < nrow(obj)) {
if (length(icon) > 1)
warning("kmlPoints: length(icon) does not match nrow(obj). Only the first one will be used.")
icon <- icon[1]
}
col2kmlcolor <- function(col) paste(rev(sapply(col2rgb(col, TRUE), function(x) sprintf("%02x", x))), collapse = "")
kml <- kmlStyle <- ""
kmlHeader <- c("<?xml version=\"1.0\" encoding=\"UTF-8\"?>","<kml xmlns=\"http://earth.google.com/kml/2.2\">", "<Document>")
kmlFooter <- c("</Document>", "</kml>")
#for (i in 1:nrow(obj)) {
for (i in 1:100) {
point <- obj[i, ]
pt_name = name[i]
pt_description = description[i]
pt_style <- paste("#style", ifelse(length(icon) == 1, 1, i), sep = "")
kml <- append(kml, "<Placemark>")
kml <- append(kml, paste(" <description><![CDATA[",pt_description, "]]></description>", sep = ""))
#kml <- append(kml, "<Style><IconStyle>")
#kml <- append(kml, paste("<color>", col2kmlcolor(col[i]), "</color>", sep =""))
#kml <- append(kml, paste(" <Icon><href>", icon, "</href></Icon>", sep = ""))
#kml <- append(kml, "<scale>0.300000</scale>")
#kml <- append(kml, "</IconStyle></Style>")
kml <- append(kml, " <Point>")
kml <- append(kml, " <coordinates>")
kml <- append(kml, paste(point@coords[1], point@coords[2], sep = ","))
kml <- append(kml, " </coordinates>")
kml <- append(kml, " </Point>")
kml <- append(kml, "</Placemark>")
}
return(paste(paste(c(kmlHeader, kmlStyle, kml, kmlFooter), sep = "", collapse = "\n"), collapse="\n", sep = ""))
}
data <- MyPointKML(shp2,kmlname,kmldescription,name,description,icon,colcode)
google.show_kml_data_on_maps(data)
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