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Author ORCID Identifier
0000-0002-4222-1544, 0009-0007-5432-355X
Publication Date
2026
Keywords
Sylvester Manor, Historical Archaeology, Ground Penetrating Radar
Disciplines
Archaeological Anthropology | United States History
Description
The .rd7 files are the type generated by MALA GPR systems to record raw data (they are unprocessed binary data files containing the recorded electrical signals), along with .cor (coordinate data), .mrk (markers on radargrams), .mrkj (modern version of .mrk), and .rad (header file; contains survey parameters, antenna frequency, samples per trace, time window, and velocity) files. The info.dat file was derived from GPR-Slice. It is a critical ASCII text file that maps the GPR radargram filenames to their specific spatial positions. It defines the survey grid layout, including line lengths, survey direction (X or Y), and profile spacing. These are all needed to work with the raw GPR data.
Each shapefile is comprised of seven different file types: .CPG, .dbf, .prj, .sbn, .shp, .shx, and a .sbx file and all are needed for the shapefiles to function. The .shp files are the main files that store the actual spatial data (points, lines, or polygons). The other files contain character encoding (.CPG), shape attributes (.dbf), projection/coordinate system information (.prj), spatial index information for queries (.sbn, .shx, .sbx).
Grant/Award Number and Agency
Mellon Foundation Grant to support the historic Manor House renovation and expanded History & Heritage Department programming and staffing.
Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Steinberg, John M.; Schoenfelder, John; Mrozowski, Stephen; Lee, Nedra; Torrini, Chiara M.; Ostoyich, Tess; Ross, Claire; and Kinney, Joseph E., "Family Cemetery GPR Survey Data from Sylvester Manor UMass Boston Archaeological Work, Shelter Island, NY" (2026). Data and Datasets. 8.
https://scholarworks.umb.edu/data/8
Comments
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