Complex sentence: Vertical exaggeration (VE) is a scale that is used in raised-relief maps, plans and technical drawings (cross section perspectives), in order to emphasize vertical features, which might be too small to identify relative to the horizontal scale.
Split into simpler sentences: Vertical exaggeration (VE) is a scale that is used in raised-relief maps, plans and technical drawings (cross section perspectives). The exaggeration is used to emphasize vertical features, which might be too small to identify relative to the horizontal scale.