ExportKMLTelemetry: ExportKMLTelemetry
In Blakemassey/gisr: Functions for Spatial Data Manipulation and Plotting

Create a Google Earth KML file (points and multitrack) from lat/long coordinates.

ExportKMLTelemetry(df, id, datetime, lat, long, alt, alt_mode, speed,
  agl, behavior, point_color, point_metadata, point_pal, point_r_pal,
  point_b_pal, extrude, path, path_color, path_metadata, path_pal,
  path_r_pal, path_b_pal, arrow, icon_by_sex, labelscale, dateformat,
  timeformat, datetimeformat, file, output_dir)

`df`	input dataframe, must have id, lat, long, and datetime
`id`	column name of unique identifier, data is split into unique paths and separate folders based on this parameter
`datetime`	column name of datetime in POSIXct format or as a character in the format (%Y/%m/%d %H:%M)
`lat`	column name of latitude coordinates (WGS84, dec. degree)
`long`	column name of longitude coordinates (WGS84, dec. degree)
`alt`	input dataframe column name for altitude(m). Optional.
`alt_mode`	based on KML code: "absolute","clampedToGround", "relativeToGround" (see KML documentation for description). Default is "clampedToGround".
`speed`	input dataframe column name for speed. Optional
`agl`	input dataframe column name for "altitude above ground level", optional
`behavior`	input dataframe column name for behavior. Optional
`point_color`	column name that determines the color for each point, may be same as 'id' parameter, but may also be sex, behavior, season, etc. Default is 'id' parameter
`point_metadata`	location of metadata .csv file. Metadata file must have a column that matches name of 'point_color'parameter and "icon_color" column with hexadecimal colors.
`point_pal`	name of color palette funtions (e.g., rainbow, heat.colors, terrain.colors, topo.colors, cm.colors used to create colors. This parameter has priority over the other point color palette parameters. Default is NULL.
`point_r_pal`	Specifc number of 'R_pal' color palette from the 'PlotKML' Package (e.g., 1 = R_pal[[1]]). This parameter has priority over the 'b_pal' parameter for setting the colors. Default is NULL.
`point_b_pal`	color palette name from RColorBrewer package, default is "Set1". Automatically adjusts number of colors to match the unique number of factors in the 'point_color' column of the input dataframe.
`extrude`	logical, either FALSE (default) for no line, or TRUE which extends a line from the point to the ground.
`path`	logical, to create Track paths. Default is TRUE.
`path_color`	similar to 'point_color' parameter, but the value must have the same factor level structure as the id file, because each path is constructed for each id factor. Default will use 'id' parameter.
`path_metadata`	location of metadata .csv file. Metadata file must have a column that matches name of 'path_color' parameter and an "icon_color" column with hexadecimal colors.
`path_pal`	name of color palette funtions (e.g., rainbow, heat.colors, terrain.colors, topo.colors, cm.colors used to create colors. This parameter has priority over the other point color palette parameters. Default is NULL.
`path_r_pal`	Specifc number of 'R_pal' color palette from the 'PlotKML' Package (e.g., 1 = R_pal[[1]]). This parameter has priority over the 'b_pal' parameter for setting the colors. Default is NULL.
`path_b_pal`	color palette name from RColorBrewer package, default is "Set1". Automatically adjusts number of colors to match the unique number of factors in the 'point_color' column of the input dataframe.
`arrow`	logical, use arrow heads on path icons.
`icon_by_sex`	logical, use different icons based on "sex" column
`labelscale`	adjusts the size of the Google Earth location point labels. Default is 0, which hides the labels. To show labels, change to a value between 0.7-1.
`dateformat`	changes the format of the date in the Google Earth location pop-up windows. Default is "%Y/%m/%d".
`timeformat`	changes the format of the time in the Google Earth locations pop-up windows. Default is "%I:%M %p".
`datetimeformat`	changes the datetime format for the label of highlighted points. Default is "%Y/%m/%d %I:%M %p"
`file`	filename of output KML file, default is name of input dataframe
`output_dir`	name for folder in the KML file, default is working directory