The first Atlas Essential is to respect atlas blocks. When you go out atlasing, make sure that all observations on a single checklist are from within a single block.
The NY BBA III divides New York state into 5,710 ‘atlas blocks’—roughly 3 x 3 mile squares used to map New York’s breeding birds. Atlas blocks are based on 7.5’ USGS Topo Quads that are broken up into 6 smaller blocks. Each block is named with the name of the topo quad followed by the position of the block within the quad.