Attributed North American Grid-Based Offshore Sampling Frames: Alaska and Canada

This sampling frame is a set of grid-based, finite-area frames spanning the offshore areas surrounding Alaska and Canada, and is intended for use with the North American Bat Monitoring Program (NABat). Alaskan and Canadian waters are combined into a single grid. A Generalized Random-Tessellation Stratified (GRTS) Survey Design draw was added to the sample units from the raw sampling grids (https://doi.org/10.5066/P9XBOCVV). The GRTS survey design algorithm assigns a spatially balanced and randomized ordering (GRTS order) to each cell within its respective framework. Grid cells are prioritized numerically; the lower the number, the higher the sampling priority. Cells can then be selected for monitoring following the GRTS order, ensuring [...]