When the system draws some feature, it should know how it should be displayed in particular: which color, line width to use and so on. Such characteristics of display are called feature displaying style (or simply style). Styles are specified by means of ObjectLand, and they can be different for one and the same feature depending on the information to be emphasized graphically when displaying a map.
A set of elements comprising feature style depends on spatial category of this feature, that is:
for point features: map symbol (graphics using which the system will display the feature);
for line features: line style (that is, line width, its structure and color);
for area features: boundary line style, fill style (method of displaying feature's inside), hatch style of feature's inside (hatch is used mainly in devices like plotters, which are unable to perform solid fill style);
for text features: font and color;
for monochrome image features: the foreground, background colors, transparency and inversion attributes. Multicolor images do not have style attributes.
 |  |
