Mapping sun exposure and slope is crucial in landscaping because it guides plant selection and design to ensure health and longevity. Different plants require varying light levels, so identifying sunny, shady, and partially shaded areas maximizes survival. Slope affects drainage and erosion risk; steep areas need erosion control or drought-resistant plantings. This planning prevents wasted resources on plants that won’t thrive and supports efficient irrigation layouts. Understanding sightlines helps position features for optimal visual impact. Completing this assessment before planting optimizes investment and contributes to a cohesive, attractive yard that works with natural conditions rather than fighting them.