Description: This feature class is a compilation of the US Census Geographies (Polygons) for 1990, 2000, 2010 and 2020 at the Tract, Block Group, and Block scale for the Tahoe Basin. Each feature has been assigned a TRPAID as a unique ID, which is a combination of the Census derived GEOID and the census year. It is intended to be used in combination with the Census_Demographics table which contains downloaded census data that can be joined using TRPAID