What does edge matching (warping, rubber sheeting) contribute to in cartography?

Edge matching, often referred to as warping or rubber sheeting, plays a crucial role in cartography by ensuring that adjacent maps align correctly. This technique allows cartographers to adjust the edges of map sections so that geographical features on one map will accurately correspond to those on an adjacent map. By aligning these features properly, the continuity and coherence of spatial information are maintained, which is essential for accurate representation and analysis.

When maps are produced piecemeal or come from different sources, discrepancies in scaling, projection, or the inherent distortion of the maps can lead to misalignment. Edge matching addresses these issues, allowing for a seamless transition between map sections, which is particularly important for creating comprehensive regional maps that rely on the accurate representation of features such as roads, rivers, and political boundaries.

The other options do not specifically capture the essence of what edge matching accomplishes. While improving color contrast relates to visual clarity and data representation, it does not involve spatial alignment. Automating map generation refers to processes that streamline the creation of maps but doesn't specifically address the alignment of existing map sections. Enhancing three-dimensional effects involves adding depth to maps but does not pertain to the critical task of aligning edges for continuity and accuracy.