#' @rdname spplot3d
spplot3d.polygons <- function(obj, att = NULL, col = "brown2", height = 0.2, ADD = FALSE,
type = c("osm", "osm-bw", "maptoolkit-topo", "waze", "mapquest",
"mapquest-aerial", "bing", "stamen-toner", "stamen-terrain",
"stamen-watercolor", "osm-german", "osm-wanderreitkarte", "mapbox",
"esri", "esri-topo", "nps", "apple-iphoto", "skobbler",
"cloudmade-<id>", "hillshade", "opencyclemap", "osm-transport",
"osm-public-transport", "osm-bbike", "osm-bbike-german"),
minNumTiles = 10, CRS = NULL, grid = FALSE, col_grid = "black",
col_axes = "white", open3d = TRUE, ...)
{
if (!is(obj, "SpatialPolygons"))
stop("Not a SpatialPolygons object")
if (is.na(proj4string(obj)))
stop("No projection specified!")
if (ADD && is.null(CRS))
stop("CRS needed in order to add objects to existing plot!")
type <- match.arg(type)
crs_ll <- CRS("+init=EPSG:4326")
if (!ADD) {
obj <- spTransform(obj, crs_ll)
list <- .grabMap(obj, type = type, CRS = CRS, minNumTiles = minNumTiles)
obj <- list$obj
map <- list$map
map3d(map, col_axes = col_axes, open3d = open3d, ...)
} else {
obj <- spTransform(obj, CRS)
}
if (!is.null(att) && att %in% names(obj)) {
if (!ADD) title3d(main = att, col = col_axes)
pos <- match(att, names(obj@data))
att_data <- obj@data[,pos]
if (is(att_data, "factor")) {
levels <- levels(att_data)
if (length(col) < 2) col <- rainbow(length(levels))
crp <- colorRampPalette(col)(length(levels))
col <- crp[att_data]
plot(1, type = "n", axes = FALSE, xlab = "", ylab = "")
legend(1, 1, legend = levels, fill = crp, xjust = 0.5, yjust = 0.5, title = att)
} else {
centroids <- coordinates(obj)
segments <- mat.or.vec(2 * nrow(centroids), 3)
for (i in 1:(2 * nrow(centroids))) {
for (j in 1:2) {
segments[i,j] <- centroids[ceiling(i/2), j]
}
}
att_data_scaled <- (att_data/max(att_data))*7
for (i in 1:length(att_data_scaled)) {
segments[i*2, 3] <- att_data_scaled[i]
}
}
} else {
warning("No Attribute chosen or not found in 'obj'!")
}
polys <- slot(obj, "polygons")
po <- slot(obj, "plotOrder")
for (i in po) {
polys2 <- slot(polys[[i]], "Polygons")
po2 <- slot(polys[[i]], "plotOrder")
for (j in po2) {
coords <- coordinates(polys2[[j]])
if (isTRUE(polys2[[j]]@hole)) {
color <- "black"
} else {
color <- col
}
if (length(col) > 1 && !is.null(att) && att %in% names(obj)) {
lines3d(coords[,1], coords[,2], height, col = color[i], lit = F, lwd = 3)
} else {
lines3d(coords[,1], coords[,2], height, col = color, lit = F, lwd = 3)
}
if (!is.null(att) && !is(att_data, "factor")) {
segments3d(segments[((2*i)-1):(2*i), 1:3], lwd = 5, col = "slateblue1", alpha = 0.8)
}
}
}
if (!is.null(att) && !is(att_data, "factor")) {
ticks <- c(min(att_data_scaled), max(att_data_scaled)/2, max(att_data_scaled))
labels <- c(min(att_data), max(att_data)/2, max(att_data))
axis3d(c("z-+"), col = col_axes, at = ticks, labels = labels)
}
if (grid) grid3d(c("x", "y", "z+"), col = col_grid)
}
#' @aliases spplot3d,SpatialPolygons-method
#' @rdname spplot3d
setMethod("spplot3d", signature("SpatialPolygons"), spplot3d.polygons)
#' @aliases spplot3d,SpatialPolygonsDataFrame-method
#' @rdname spplot3d
setMethod("spplot3d", signature("SpatialPolygonsDataFrame"), spplot3d.polygons)
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