How accurate are Tax Map Scales?
Section 2.23 of the NY State Rules and Regulations for the Preparation and Maintenance of Tax Maps for Real Property Assessment and Taxation Administration stipulates that the absolute position accuracy of the base manuscript ( aerial photography background base map ) shall be such that 90% of all well defined planimetric features are plotted within 1/40 inch of their true coordinate positions as measured on original 1″ = 400′ and 1″ = 200′ manuscripts. This basically means that 90% of the positional accuracy of items on the background tax map aerial photography must be accurate spatially to the ground to within 10 feet of the true position.
