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

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

ExportKMLPoints(
  df,
  id = "id",
  lat = "lat",
  long = "long",
  alt = NULL,
  alt_mode = "clampToGround",
  icon_href = file.path("http://maps.google.com", "mapfiles/kml//paddle/wht-blank.png"),
  icon_scale = 0.7,
  point_col_var = NULL,
  point_color = NULL,
  point_metadata = NULL,
  point_pal = NULL,
  point_r_pal = NULL,
  point_b_pal = "Set1",
  extrude = FALSE,
  labelscale = 0,
  file = NULL,
  output_dir = NULL
)

`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
`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".
`icon_href`	HTML address of the icon used for points. Default: "http://maps.google.com/mapfiles/kml/paddle/wht-blank.png"
`icon_scale`	numeric, scale for icon. Default is 0.7.
`point_col_var`	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_color`	R color name (e.g. "yellow3") for the color of all the points
`point_metadata`	location of metadata .csv file. Metadata file must have a column that matches name of 'point_col_var' 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_col_var' 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.
`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.
`file`	filename of output KML file, default is name of input dataframe
`output_dir`	output folder location, default is getwd()