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Priority sampling locations for the Integrated Monarch Monitoring Program

Sample locations


Publication Date
Time Period


Weiser, E.L. and Thogmartin, W.E., 2018, Priority sampling locations in the eastern U.S. for the Integrated Monarch Monitoring Program: U.S. Geological Survey data release,


The sampling locations provided here were selected as a two-stage Generalized Random Tessellation Stratified (GRTS) sample (Stevens & Olsen 2004). The first stage of the GRTS draw used a master sample developed by the North American Bat Monitoring Program (Loeb et al. 2015) from a 10 x 10 km grid placed over the conterminous U.S., Canada, and Mexico. Each 10 x 10 km grid cell (hereafter, master cell) was assigned a GRTS rank by NABat. The rank represents the priority order in which master cells should ideally be sampled. For the second stage of the draw, sampling points within a master cell were selected. Each point was defined as a 30 x 30 m cell of the GIS raster that defined monarch-relevant habitat. Sampling points within each [...]

Child Items (6)


Point of Contact :
Emily L Weiser
Originator :
Emily L Weiser, Wayne E Thogmartin
Metadata Contact :
Emily L Weiser
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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Canada_mastersample.csv 2.33 MB
CONUS_mastersample.csv 2.93 MB
Mexico_mastersample.csv 1.36 MB


These locations were developed to provide a means of obtaining a spatially balanced sample that is representative of all land-use sectors of interest. Any project interested in the same sectors could use these same location lists, but projects with different sectors of interest would need to re-draw the second stage of the GRTS sample.


Spatial Services

ScienceBase WMS


  • Upper Midwest Environmental Sciences Center (UMESC)



Data source
Input directly

Additional Information


Type Scheme Key
DOI doi:10.5066/P9EMA1YI

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