Leach's Storm-Petrel is a state-listed endangered species that breeds at two locations in Massachusetts (Nomans Land Island and Penikese Island) as observed by Massachusetts Division of Fisheries and Wildlife (DFW) biologists. The important habitat areas are these breeding sites buffered 0.3 nautical miles.
To allow for consistent evaluation and comparison of a variety of datasets with distinct spatial resolutions, accuracies, and other characteristics, the Massachusetts ocean management planning area was partitioned into 250 x 250-meter grid cells, each with a unique ID. These data were converted to the planning area grid by extracting all of the cells in which the data layer occurred. The data were then dissolved into one feature.