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Mapping the Trail of Tears in Southern Illinois Exhibit

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2-D GPR profile (Line29) collected with the 250 MHz NOGGIN system

  • a) Processed (gained and dewowed) GPR data profile
  • b) After application of background filter to remove low frequency noise
  • c) Data migrated with an average velocity for moist loess (silty-clay soil).

Several known graves were imaged along with some possible unmarked graves.

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image detailing data from suspected grave sites

3 Interpolated -D block of 200 MHz Pulse-EKKO IV data showing the location and orientation of known graves and the unmarked grave highlighted in yellow.

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image detailing scan at suspected grave site

Amplitude time slices produced from processed and interpolated 250 MHz GPR data. The left image is a time slice of the 22-26 ns (16 cm) interval which corresponds to an approximate depth of 1.0 m.

The right image is sliced from 25-30 ns, or roughly 1.2 m below the surface. Most of the marked graves have been imaged, although some are represented as more subtle anomalies on this color display. Some possible unmarked graves are also observable at coordinates X=17 m and Y=24-29 m.

Click Photo To Englarge
image detailing suspected grave site

Regional Sponsors

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National Sponsors

Bank of America Evelyn & Walter Haas, Jr Fund Corporation for Public Broadcasting The Arthur Vining Davis Foundations Park Foundation

National Park Foundation The Peter Jay Sharp Foundation The Pew Charitable TrustsGM


Florentine Films and WETA

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