The scenic quality rating for a shoreline travel unit is a distinct score for the individual view of specific features of the landscape. 'Scenic resources', as they are called, are seen from a specific location within a shoreline travel unit looking back to the shoreline. Tracking these changes is important because it provides a measure of how changes in land use and development over time affect these resources. The primary drivers affecting scenic quality in the shoreline areas of Lake Tahoe are land use, and the visual exposure and visual/aesthetic characteristics of development visible from Lake Tahoe. The TRPA Code of Ordinances specifies design standards and guidelines for new development and redevelopment projects along the shoreline through the Scenic Shoreland Ordinances adopted in 2002 and is intended to attain the threshold standards as older development is gradually replaced with newer development that has reduced visual impacts. Also, the 2018 Shoreline Plan provides design standards to mitigate the scenic impacts of new shoreline structures authorized under the plan. Every four years, a team of professionals examines and evaluates the quality of scenic resources along Tahoe's shoreline.