Survey Mark Data
Sources of survey data
This list contains both professional data and information for recreational hunters, so please note the source of each and evaluate accordingly. Also note that some sources, USGS datasheets in particular, contain many superseded marks that are no longer reliable for survey purposes but are very useful for recreational survey mark hunting.
- NGS Database: Datasheets and Survey Mark Recovery
- USGS Datasheets
- USGS datasheets I have obtained and scanned. USGS does not offer digitized datasheets.
- OPUS Shared Solutions Dashboard
- Local Control Monument Databases
- NOAA Tides & Currents Bench Mark Data Sheets
- Tidal benchmark station locations and descriptions
- The NOAA CORS Network (NCN) Web Map
- U-SMART
- USACE (Army Corps of Engineers) Survey Monument Archival & Retrieval Tool
- Yellowstone National Park Benchmark Database
- Waymarking search for “survey markers”
- The Corner Corner
Selected historical data
These sources represent the types of historical documents I often consult when searching for marks, and are specific to the areas I search. You will likely find similar resources for other areas by searching Google Books, the NOAA Library, and the USGS Publications Warehouse.
- Results of Spirit Leveling in Arizona. 1899 to 1915, inclusive.
- Triangulation in Maine
- By Walter F. Reynolds. 1918.
- Spirit Leveling in Maine, 1899-1915
- By R. B. Marshall. 1916.
- Triangulation in Arizona
- “1927 datum. Part 1: First- and second-order triangulation in south central part of state, by Clement L. Garner. 1941.”
- Precise Leveling in New York City
- By Frederick W. Koop. Executed 1909 to 1914.
- Triangulation and Primary Traverse, 1913-1915
- This USGS Bulletin (#644) provides data and descriptions for triangulation and traverse stations determined between 1913 and 1915. The full document is a large file (205MB); USGS has this file broken down by state/region at USGS Publication Warehouse.