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Labeling Curves with Curved Labels

Labeling places and features is an important topic in cartography [1]. As well as improving readability, labels can convey place or feature type and hierarchy through their position, orientation, size, colour, typeface and style. These characteristics also have aesthetic impacts on the map which cartographers and designers use to affect how people engage and interpret maps. Curved labels are often used on maps. Places (point features) around a coastline may benefit from curved labels that do not interfere with surrounding linework (Fig. 1a). Labels that follow linear features (Fig. 1b) help improve their association (compare with Fig. 1c). Curved labels can also help indicate the shape of aerial features (Fig. 1e) and can fit into the space more effectively (Fig. 1d). Curvature as a label style may also help distinguish different types of features (Fig. 1e). Although there are benefits to curved labels, curvature should be kept low and symmetrical where possible to improve legiblity [2].