UP JOAD Data Paper template version 0.2
Data paper for submission to the Journal of Open Archaeology Data To complete this template, please replace the blue text with your own. The paper has four main sections: (1) Overview; (2) Methods; (3) Dataset description; (4) Reuse potential. Please submit the completed paper to:
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(1) Overview Title Ground-‐Penetrating Radar (GPR) Data from an Antelope Creek Site (41PT283) in Potter County, Texas
Paper Authors 1. Selden Jr., Robert Z. 2. Mudd, Michael L. 3. Bousman, C. Britt
Paper Author Roles and Affiliations 1. Center for Regional Heritage Research, Stephen F. Austin State University 2. Department of Anthropology, Texas State University 3. Department of Anthropology, Texas State University
Abstract
On June 27, 2015, a ground-‐penetrating radar (GPR) survey was conducted at an Antelope Creek site (41PT283) on the Cross Bar Ranch in Potter County, Texas. These data represent raw, unprocessed data collected along the X-‐axis of a 13m (X-‐axis) x14m (Y-‐axis) grid at 50cm intervals. This survey is linked to an existing grid from previous investigations at the site in 2007 and 2008. These data will serve as a comparative reference for additional GPR surveys in the area of the Canadian River basin, can be used as an educational dataset to teach GPR processing techniques, and is representative of one of the first GPR surveys at an archaeological site in the Texas panhandle.
Keywords
Ground-‐Penetrating Radar, GPR, Texas, Antelope Creek
Context
Spatial coverage
UP JOAD Data Paper template version 0.2 Description: USA, Texas, Potter County
Temporal coverage
GPR data from preliminary research at an Antelope Creek site (ca. A.D. 1250-‐1450).
(2) Methods
Datum A from the 2007 excavations at 41PT283 was used as the origin point to place the GPR grid atop a 13m x 14m section of the site (Figure 1). The plotting of grid corners and boundaries was done with a Sokkia Set 6 Total Station. Closure with the original grid was within 1 cm at the southwest corner of the GPR grid. Wooden stakes were used to mark the corners of the grid, then a string was run along the Y-‐ axis on the east and west boundaries of the grid. The east boundary of the grid can be seen between Bousman and Selden in Figure 1. Figure 1. Bousman (left) and Selden (right) layout the grid at 41PT283. Datum A is below the Sokkia Total Station. Along the western Y-‐axis, flagging tape was used to mark 50cm increments along the 14m boundary. A survey tape was used along the eastern axis, and a stadia rod was used to mark the end point of each transect. Steps The GPR unit is a SIR3000 with a 400MHz antenna in a cart (#623) from Geophysical Survey Systems, Inc. (GSSI). Once the cabling was connected, the battery was inserted and the unit was powered on. TerraSIRch was used for data collection. Under the Collect menu, the Radar was set to 400MHz with a T_Rate of 100KHz in distance mode with no geographic positioning system (GPS). Returning to the Collect menu, Scan settings were set to samples (512), format(bits) (16), range (nS) (60), diel (18.00), rate (120), scn/unit (13.00), and gain (dB) (0). Position was set to manual with a 7.10 offset and a surface (%) of 10.00. Filters were set at the following: LP_IIR (800), HP_IIR (100), LP_FIR (0), HP_FIR (0), Stacking (0), BGR_RMVL (0). Five gain points were used in this survey. Prior to setting those, the GPR unit was pushed around much of the survey block. When the area with the strongest signal was identified, the gains were reset by toggling from manual to auto, then back to manual. This helps to ensure that the readings would fall within an acceptable range. For 41PT283, these were GP1 (dB) (-‐12.00), GP2 (dB) (-‐12.00), GP3 (dB) (37.00), GP4 (dB) (37.00), and GP5 (dB) (47.00). Michael Mudd then began data collection at the northwest corner of the site proceeding along the X-‐axis to the northeast boundary (at Datum A), where those data were saved (Figure 2). The second transect runs parallel and 50cm south of the first, from the eastern to the western boundary. This pattern was repeated a total of 29 times.
UP JOAD Data Paper template version 0.2 Figure 2. GPR grid for 41PT283. Sampling strategy This site (41PT283) was previously excavated in 2007 and 2008 [1], and the GPR grid was integrated within the larger site grid. The archaeological records, artifacts and other materials from 41PT283 are curated at the Center for Archaeological Studies at Texas State University—San Marcos, and are currently undergoing analysis for a Master’s thesis, of which these GPR data will be a part.
(3) Dataset description
Object name Ground-‐Penetating Radar (GPR) Data from 41PT283 in Potter County, Texas Data type These are the primary (raw) data, and have not been processed. Format names and versions DZT Creation dates June 27, 2015 Dataset Creators Robert Z. Selden Jr., Stephen F. Austin State University Michael L. Mudd, Texas State University C. Britt Bousman, Texas State University Language English License Creative Commons Attribution Repository location http://dx.doi.org/10.5281/zenodo.19263
Publication date 03/07/2015
(4) Reuse potential
UP JOAD Data Paper template version 0.2 These data will serve as a comparative reference for additional GPR surveys in the area of the Canadian River basin, can be used as an educational dataset to teach GPR processing techniques, and is representative of one of the first, if not the first, GPR surveys at an archaeological site in the Texas panhandle.
Acknowledgements
We express our gratitude to Ryan Howell and the Bureau of Land Management (BLM) for the requisite permissions and access needed to generate these data.
Funding statement
Department of Anthropology, Texas State University, San Marcos, Texas.
References
[1] Bousman, C. Britt 2008. Preliminary Results of the 2007 Texas State University Field School at the Cross Bar Ranch, Potter County, Texas. Center for Archaeological Studies, Texas State University—San Marcos.
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