Add transparency to maps #325
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Just makes the example more concise
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roxygen2::roxygenise(".")?Adds a
set_map_alpha()function which appends an alpha channel onto a map. This allows superimposing maps with transparency.I've included a simple test too.
For example (maps from the examples included with the function):
A 100% opaque map of London
Another 100% opaque map of London
The second map superimposed with 25% opacity
The function documentation includes the code required to produce the above maps.