Abstract
The North American Soil Geochemical Landscapes Project is a tri-national initiative between the United States, Canada and Mexico. It was established to develop a useful set of soil geochemical data for North America generated using a consistent set of protocols. It involves collecting samples at a 40 km spacing and will result in more than 10 000 samples for North America, including more than 6 100 for Canada. In 2006, a panel was convened at the U.S. Geological Survey in Denver to finalize the sampling scheme for continental coverage. The choice of a geographically based stratified random sampling plan was confirmed. The consensus was to implement the US-EPA Generalized Random Tessellated Stratified (GRTS) design procedure to determine the locations of potential sample sites.
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