kml_layer.STTDF: Write a space-time trajectory to KML

Description

Writes an object of class "STTDF" to a KML file with a possibility to parse attribute variables using several aesthetics arguments.

Usage

kml_layer.STTDF(obj, id.name = names(obj@data)[which(names(obj@data)== "burst")],
    dtime, extrude = FALSE, 
    start.icon = paste(get("home_url", envir = plotKML.opts),
         "3Dballyellow.png", sep = ""), 
    end.icon = paste(get("home_url", envir = plotKML.opts), 
          "golfhole.png", sep = ""), 
    LabelScale = 0.8 * get("LabelScale", envir = plotKML.opts), z.scale = 1,
    metadata = NULL, html.table = NULL, ...)

Arguments

obj

space-time object of class "STTDF" (spatio-temporal irregular data.frames trajectory)

id.name

trajectory ID column name

dtime

temporal support size (in seconds)

extrude

logical; extrude GPS vertices?

start.icon

start icon name (3Dballyellow.png)

end.icon

destination icon name (golfhole.png)

LabelScale

the default size of icons

z.scale

vertical exaggeration

metadata

(optional) specify the metadata object

html.table

optional description block (html) for each GPS point (vertices)

...

other optional arguments

encoding

latin1

Details

The dateTime is defined as yyyy-mm-ddThh:mm:sszzzzzz, where T is the separator between the date and the time, and the time zone is either Z (for UTC) or zzzzzz, which represents �{+-}hh:mm in relation to UTC. For more info on how Time Stamps work see http://kml-samples.googlecode.com. If the time is measured at block support, then: tags will be inserted. Temporal support for any spacetime class, if not specified by the user, is determined as a difference between the "time" (indicating begin time) and "endTime" slots.

References