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Attributed North American Grid-Based Offshore Sampling Frames


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Stratton, C.A., Straw, B.R., Cox, J.H., Irvine, K.M., Tousley, F.C., and Reichert, B.E., 2023, Attributed North American Grid-Based Offshore Sampling Frames: U.S. Geological Survey data release,


This sampling frame is a set of grid-based, finite-area frames spanning the offshore areas surrounding Canada, the United States, and Mexico, and is intended for use with the North American Bat Monitoring Program (NABat). A Generalized Random-Tessellation Stratified (GRTS) Survey Design draw was added to the sample units from the raw sampling grids ( 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 both randomization and spatial balance. [...]

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These sampling frames were created to facilitate contributions of bat data collected in offshore areas surrounding North America to the North American Bat Monitoring Program.

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DOI doi:10.5066/P9H8NEOY

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