Work Description

Title: Magnetometer Survey Data from the Weeden Island Site (8Pi1), Florida (2013-2014) Open Access Deposited
Attribute Value
  • We used a Bartington Grad601-2 dual fluxgate gradiometer to survey four areas, two with approximate areas of 15 x 15 m, one 30 x 20 m area, and one 20 x 20 m area. In each area, we cleared vegetation including saplings and undergrowth. In 2013, while collecting data for Survey Areas 1 and 2, both gradiometer sensors were used to collect data at a sample interval of 0.125 m along traverses spaced 0.5 m apart. Each line was walked in opposite directions (sometimes referred to as bi-directional). In 2014, while collecting data for Survey Areas 3 and 4, we used just a single gradiometer sensor and collected data along traverses walking in one direction only. Due to the subtle nature of the archaeological anomalies and the large number of trees and other obstacles, this unidirectional methodology produced higher quality data by reducing striping defects caused by different sensors and orientations, although survey speed is significantly slower. Processing of magnetometer data was limited to clipping of the data, sensor destripe to reduce striping in the 2013 data (survey grids 1 and 2) due to sensor mismatch, and interpolation.
  • The data (raw data, composite files [processed], and some images) can be read by the program TerraSurveyor. Version of the software was used to create the composite files in this deposit.

  • The magnetometer data was the second step in a geophysical survey program that began with magnetic susceptibility survey of a portion of the Weedon Island Preserve in St. Petersburg, Florida. Geophysical survey was used to map human occupation of the study area and to guide subsequent archaeological excavations.
Contact information
Date coverage
  • 2013-11 to 2014-12
Citations to related material
  • Sampson, C. P. (2019) Safety Harbor at the Weeden Island Site: Late Pre-Columbian Craft, Community, and Complexity on Florida's Gulf Coast. PhD Dissertation, University of Michigan.
  • Forthcoming: Sampson, Christina Perry and Timothy J. Horsley. Using Multi-Staged Magnetic Survey and Excavation to Assess Community Settlement Organization: A Case Study from the Central Peninsular Gulf Coast of Florida. Advances in Archaeological Practice.
Article access in Deep Blue
Resource type
Last modified
  • 12/12/2019
  • 12/12/2019
To Cite this Work:
Horsley, T., Sampson, C. (2019). Magnetometer Survey Data from the Weeden Island Site (8Pi1), Florida (2013-2014) [Data set]. University of Michigan - Deep Blue.


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