What type of maps are used to plot base flood elevations for floodplain mapping?

Base flood elevations (BFEs) are crucial for understanding the potential hazards associated with flooding and are typically represented on floodplain maps. Topographic or contour maps are specifically designed to illustrate the terrain and elevation of an area, showcasing variations in height through contour lines. These features make them ideal for plotting BFEs, as they provide a clear visual representation of the landscape and allow for the identification of how floodwaters will behave in relation to the natural topography of the area.

In contrast, satellite or aerial maps offer a bird's-eye view of land use and cover but do not provide detailed elevation information necessary for understanding flood risk. Geological or ecological maps focus on the physical characteristics of the earth and habitat types, not specifically on hydrology or floodplain elevations. Hydrological or meteorological maps concentrate on water movement and weather patterns, which are important for flood prediction but do not represent ground elevation details needed to determine BFEs.

Therefore, utilizing topographic or contour maps ensures accurate plotting of base flood elevations, which is essential for effective floodplain management and risk assessment.