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A survey of Hogna carolinensis burrows on Nantucket Island, MA

<p>This dataset contains the locations of <em>Hogna carolinensis</em> burrows in the Quaker Cemetery on Nantucket Island, MA. This population is probably near where James Emerton collected specimens in 1928/1929. (<a href="https://www.mariamitchell.org/wp-content/uploads/Publication_Johnson1930_Insects.pdf">https://www.mariamitchell.org/wp-content/uploads/Publication_Johnson1930_Insects.pdf</a>).<br> Students from Matt Liddle&#39;s Nantucket New School 8th grade class measured and recorded these data under the guidance of Andrew Mckenna-Foster on 22 April and 13 May 2016.<br> To calculate georeferenced locations for each burrow, we chose a convenient base point that is 38 meters at 280 degrees from the hydrant at the SE corner of the Quaker Cemetery. Using QGIS and data from MassGIS (<a href="http://www.mass.gov/orgs/massgis-bureau-of-geographic-information">https://www.mass.gov/orgs/massgis-bureau-of-geographic-information</a>), we found the UTM coordinates of the hydrant and calculated the coordinates of the base point: 407230.04E 4570493.1N UTM 19N NAD83.<br> For each burrow we collected a bearing and distance from base point to calculate a UTM coordinate. We also measured the turret height, full turret width, and interior turret width.<br> These data do not represent all the burrows in the area but cover the main population center.<br> We hope that this dataset acts as a reference point for follow up surveys.</p>