addtofile: in, optional, type=object
If this keyword contains a cgKML_File object, the image is added to the file
as a ' and set up the path
to 7z.exe correctly in cgKML2KMZ. If you don't understand, please don't
set this keyword!
latlonbox: out, optional, type=array
A four-element array giving the boundaries of the map projection in the
Google Map form of [north, south, east, west]. Normally, this information
is obtained from the mapCoord object and need not be passed in. The values
are in latitude and longitude coordinates that go from -90 to 90 and -180 to
180 degrees, respectively.
max_value: in, optional
The value to use for the MAX value when the image is scaled with BYTSCL.
min_value: in, optional
The value to use for the MIN value when the image is scaled with BYTSCL.
missing_value: in, optional, type=various
The "color" of a pixel that will be treated as a "missing" color or value.
Any pixels in the image with this color value will be set completely
transparent. If `Color` is a string, use cgColor to obtain a color triple.
If `Color` is a non-strint scalar, this value is taken to be the missing color index
in a 2D image. Otherwise, this is assumed to be a color triple that indicates
the "missing" color or value in the output image. The alpha channel in the output image
is set to 0 for the "missing" color, which makes this value completely transparent.
If the `Transparent` keyword is not used, it is set to 0 by using the `Missing_Value`
keyword.
palette: in, optional, type=byte
Set this keyword to a 3x256 or 256x3 byte array containing the RGB color
vectors to be loaded before the transparent image is created. Such vectors can be
obtained, for example, from cgLoadCT with the RGB_TABLE keyword::
IDL> cgLoadCT, 4, /BREWER, /REVERSE, RGB_TABLE=palette
IDL> tImage = cgTransparentImage( cgDemoData(7), PALETTE=palette)
The default is to use whatever colors are loaded in the current hardware color table.
A palette applies only to 2D input images.
placename: in, optional, type=string
This is the element in a Feature object. It is user-defined text that is used as
the label for an object in Google Earth.
resize_factor: in, optional, type=float
Setting this keyword to a value allows the user to resize the image prior to making the
PNG image file that will be output with the KML file. This is especially helpful with
very large images. Setting the factor to 0.5 will reduce the image to half it's normal
size before processing. Setting the factor to 2.0 will increase the size by a factor
of 2 before processing. The image is resized with nearest neighbor sampling.
reverse: in, optional, type=boolean, default=0
Set this keyword to reverse the color table vectors selected with the `CTIndex` keyword.
transparent: in, optional, type=integer, default=50
The percentage of transparency desired in the output image. A number
between 0 and 100.