Every version of the count
Each step removes a known bias. "Low" and "high" bracket what the cross-checks allow.
Range by class
Where the acres are
All states
Acres are deduplicated OSM polygons plus the point-only adjustment (100 m rule). Click a column to sort.
Cross-checks
Against GCSAA
Against Census TIGER landmarks
Parcel completeness
National cemetery coverage against USGS GNIS
Known sites with published acreage
New York City vs the rest of New York
Territories, reported separately
Largest mapped sites
The biggest single features in each class. Outliers here are where mapping errors hide. Each links to the feature on OpenStreetMap.