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"U.S. Geological Survey map accuracy standards are that 90% of all data points be within 0.5 mm (1/50 inch) of their true scale location. Only Bizer meets those standards." True?

No. Bizer isn't the only one who meets those standards. Again, Duncan Press starts each chart with the U.S. map. The U.S. map has roads, shorelines, mountains, and so on all within 0.5 mm of their true scale location, so Duncan Press also has their charts within U.S. Geological Survey map accuracy standards.

Why don't we advertise it? Because it's misleading. Inland navigation CHARTS fall under the US Army Corps of Engineers (USACE) standards intended to present water and bottom features. Our charts pass those far more important standards too.

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©2017, Sally Anne Fichet
Charting the New Hampshire Lakes Since 1967®
PO Box 1253, Center Harbor, New Hampshire 03226
Last modified 1 June 2017