I am using California county Data from 2016, from the US census site
Dataset: CA_Counties_TIGER2016
Metadata: https://catalog.data.gov/harvest/object/8933496c-7da8-486e-aa66-64981962a3c5/html
What are the units of column Aland?
When I run statistics using Arcmap they show a sum of 403501101370 (which does not seem to match California;s landmass when calculated in sq m, km, acres)