Coverage mapping is required for any exterior improvements constructed on all properties within the Tahoe Basin. RCI’s mapping services conform with TRPA requirements and is required in all five jurisdictions within the Tahoe Basin: Carson City, Douglas, and Washoe Counties in Nevada, and Placer and El Dorado Counties in California. Coverage mapping depicts all impervious features on a given site, such as buildings, driveways, walkways, patios, and utilities. Typically, contours are shown to establish vertical relief and to assist the TRPA in determining land classifications which establish how much coverage, or new improvements, are allowed on a given site. Trees above 14” diameter at breast height are also shown, as they are also subject to permitting for removal by the TRPA.