With all that out of the way, let’s learn how to value land like it’s Nineteen-Zero-Nine. The assessor leads the community in collectively setting consensus land values on every stretch of street frontage in the city. Phase 2 goes like this:The assessor hands the resulting land value maps to a team of human computers who bust out their slide rules and get to work calculating the land value of every single parcel in the city according to a strict mathematical procedure. This is in sharp contrast to conventional modern mass appraisal, where the principle way you establish land values is by setting a set of base land rates for each appraisal neighborhood or land economic area (LEA). Then you calculate each parcel’s land value by multiplying its size in Somers units by the unit value of land at that location.