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North American Bat Monitoring Program (NABat) Master Sample and Grid-Based Sampling Frame

Metadata Updated: October 29, 2023

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 given the scale of movement of most bat species, which routinely travel many kilometers each night between roosts and foraging areas and along foraging routes. A Generalized Random-Tessellation Stratified (GRTS) Survey Design draw was added to the sample units from the raw sampling grids ( This sampling design produces an ordered list of units such that any ordered subset of that list is also randomized and spatially balanced.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:5b731476e4b0f5d5787c5d9c
Data Last Modified 20200911
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 16b55c79-7806-4839-abf9-6a27ae8fc124
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -179.2969,11.1784,-49.9219,83.62
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash dd6e2bb1914d0ef079e5c85f6869c110a76c9b90d6a976aca88d1ec1127dc37b
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -179.2969, 11.1784, -179.2969, 83.62, -49.9219, 83.62, -49.9219, 11.1784, -179.2969, 11.1784}

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