kml_layer.SpatialPhotoOverlay: Exports objects of type SpatialPhotoOverlay to KML

Description

Writes object of type SpatialPhotoOverlay to KML together with a COLLADA 3D model file (optional).

Usage

kml_layer.SpatialPhotoOverlay(obj, method = c("PhotoOverlay", "monolith")[1],
       PhotoOverlay.shape = obj@PhotoOverlay$shape, href = obj@filename, 
       coords, dae.name = "", heading = obj@PhotoOverlay$heading, 
       tilt = obj@PhotoOverlay$tilt, roll = obj@PhotoOverlay$roll, 
       near = obj@PhotoOverlay$near, range =  obj@PhotoOverlay$range, 
       leftFov = obj@PhotoOverlay$leftFov, rightFov = obj@PhotoOverlay$rightFov, 
       bottomFov = obj@PhotoOverlay$bottomFov, topFov = obj@PhotoOverlay$topFov, 
       altitudeMode = "clampToGround", block.size = 100, max.depth = 300, 
       scale.x = 1, scale.y = 1, scale.z = 1, refreshMode = "once", 
       html.table = NULL, ...)

Arguments

obj

object of class "SpatialPhotoOverlay" (a photograph with spatial coordinates, metadata and orientation)

method

visualization type: either "PhotoOverlay" or "monolith"

PhotoOverlay.shape

PhotoOverlay shape value (KML)

href

location of the image file

coords

(optional) 3D coordinates of the trapesoid corners

dae.name

(optional) COLLADA 3D model file name (without the extension)

heading

a PhotoOverlay argument; direction (azimuth) of the camera, in degrees

tilt

a PhotoOverlay argument; rotation, in degrees, of the camera around the X axis

roll

a PhotoOverlay argument; rotation, in degrees, of the camera around the Z axis

near

a PhotoOverlay argument; measurement in meters along the viewing direction from the camera viewpoint to the PhotoOverlay shape

range

a PhotoOverlay argument; distance in meters from the point specified by , , and to the LookAt position

leftFov

a PhotoOverlay argument; angle, in degrees, between the camera's viewing direction and the left side of the view volume

rightFov

a PhotoOverlay argument; angle, in degrees, between the camera's viewing direction and the right side of the view volume

bottomFov

a PhotoOverlay argument; angle, in degrees, between the camera's viewing direction and the bottom side of the view volume

topFov

a PhotoOverlay argument; angle, in degrees, between the camera's viewing direction and the top side of the view volume

altitudeMode

altitude mode

block.size

width of the block (100 m by default)

max.depth

300 m by default

scale.x

exaggeration in X dimension (COLLADA rectangle)

scale.y

exaggeration in Y dimension (COLLADA rectangle)

scale.z

exaggeration in Z dimension (COLLADA rectangle)

refreshMode

refresh mode for the COLLADA object

html.table

(optional) specify the description block (html) for each point

...

other additional arguments

Details

The default widht and height (100 m and 300 m) were selected based on empirical testing (level of detail in the background imagery in Google Earth). User specified coordinates can be passed via the cords argument. For more info see makeCOLLADA.rectangle.

References

KML Reference (http://code.google.com/apis/kml/documentation/kmlreference.html)
COLLADA Reference (http://collada.org/mediawiki/)

Examples

Run this code

# display spatially referenced photograph in Google Earth:
imagename = "Soil_monolith.jpg"
x1 <- getWikiMedia.ImageInfo(imagename)
sm <- spPhoto(filename = x1$url$url, exif.info = x1$metadata)
kml_open("sm.kml")
kml_layer(sm, method="monolith")
kml_close("sm.kml")
kml_compress("sm.kml", files="Soil_monolith_jpg.dae")