In its most general sense, prescriptivism is the view that one variety of language has an inherently higher value than others, and that this ought to be imposed on the whole of the speech community.

Consider modifying the plot-latlong data files to read in a variety of factors in addition to data value and location, and you can create many more varieties of maps.

This function can use a variety of different parameters (to define a gray value, or a Red-Green-Blue [RGB] color).