Attributed North American Bat Monitoring Program (NABat) Master Sample and Grid-Based Sampling Frame: Continental United States
The NABat sampling frame is a grid-based finite-area frame spanning Canada, the United States, and Mexico consisting of 10-km by 10-km (100-km2) grid cell sample units for the continental United States, Canada, and Alaska and 5- by 5-km (25km2) for Hawaii and Puerto Rico.  This grain size is biologically appropriate …