kml.tiles: Write vector object as tiled KML

In plotKML: Visualization of Spatial and Spatio-Temporal Objects in Google Earth

Description

Writes vector object as tiled KML. Suitable for plotting large vectors i.e. large spatial data sets.

Usage

kml.tiles(obj, folder.name, file.name, 
   block.x, kml.logo, cpus, home.url=".", desc=NULL, 
   open.kml=TRUE, return.list=FALSE, ...)

Arguments

obj	"SpatialPoints*" or "SpatialLines*" or "SpatialPolygons*"; vector layer
folder.name	character; KML folder name
file.name	character; output KML file name
block.x	numeric; size of block in decimal degrees (geographical coordinates)
kml.logo	character; optional project logo file (PNG)
cpus	integer; specifies number of CPUs to be used by the snowfall package to speed things up
home.url	character; optional web-directory where the PNGs will be stored
desc	character; optional layer description
open.kml	logical; specifies whether to open the KML file after writing
return.list	logical; specifies whether to return list of tiled objects
...	(optional) aesthetics arguments (see aesthetics)

Value

Returns a list of KML files.

Note

This operation can be time-consuming for processing very large vectors. To speed up writing of KMLs, use the snowfall package.

Author(s)

Tomislav Hengl

See Also

plotKML, plotKML.GDALobj

Examples

## Not run: 
library(sp)
library(snowfall)
library(landmap)
library(rgdal)

data(eberg)
coordinates(eberg) <- ~X+Y
proj4string(eberg) <- CRS("+init=epsg:31467")
## plot using tiles:
shape = "http://maps.google.com/mapfiles/kml/pal2/icon18.png"
tiles.p <- kml.tiles(eberg["SNDMHT_A"], block.x=0.05, 
   size=0.8, z.lim=c(20,50), colour=SNDMHT_A, shape=shape, 
   labels=SNDMHT_A, return.list=TRUE)
## Returns a list of tiles
data(eberg_contours)
tiles.l <- kml.tiles(eberg_contours, block.x=0.05, 
   colour=Z, z.lim=range(eberg_contours$Z), 
   colour_scale=SAGA_pal[[1]], return.list=TRUE)

## End(Not run)

plotKML documentation built on April 27, 2021, 3:01 p.m.