Comparative Archaeology Database | Center for Comparative Archaeology | University of Pittsburgh
Rajajil Columns
Geophysics Dataset
Two grids were surveyed with the CMD-mini Explorer instrument: Grid 1 and Grid 4b. Raw data files have been provided as .dat; .txt; and .xlsx. These files contain data for all 3 receivers for both apparent conductivity and apparent magnetic susceptibility. The “X” and “Y” columns correspond to the spatial location within the grid were a data point was taken. The instrument setting was placed on low, in which the 3 receivers correspond to approximately 0.25m (receiver 1), 0.50m (receiver 2) and 0.90m (receiver 3). The raw data columns correspond to the individual receivers and specific instrument response for apparent conductivity (e.g. Cond1, Cond2, Cond3) and apparent in phase magnetic susceptibility (Inph1, Inph2 and Inph3).
Suggestions for plotting these files are as follows: it is possible to open the raw data files (e.g. .dat) in Golden Software Surfer and then select the X, Y and specific receiver data columns you wish to plot. This can then be converted to a grid file (.grd) and either plotted in Surfer or imported into TerraSurveyor 64 and processed and plotted within this program. Other software applications that can be used to process and plot spatial files may also be used.
[ZIP File]
[ZIP File]
Grid 1: Data was collected with the receiver tube placed on the ground surface every 0.50 m x 0.50m across the grid. A static measurement was then taken with a 0.4 second interval. The first traverse line was collected on the western edge of the grid starting in the SW corner. A zig-zag collection strategy was used. The last traverse line was on the eastern edge of the grid. As noted above, the instrument was set on “low” and therefore collected data at 0.25m, 0.50m and 0.90m.
Grid 4b: Data was collected with the receiver tube placed on the ground surface every 0.50 m x 0.50m across the grid. A static measurement was then taken with a 0.4 second interval. The first traverse line was collected on the western edge of the grid starting in the SW corner. A zig-zag collection strategy was used. The last traverse line was on the eastern edge of the grid. As noted above, the instrument was set on “low” and therefore collected data at 0.25m, 0.50m and 0.90m.