The Crazy Ants shapefile was built from National Parks’ working database file as at December 2001. This data contains observation data made by Parks employees during their research of the crazy ant colonies on Christmas Island in 2001.
Each of the points represents a surveyed crazy ant site in 2001. Using field methods (e.g. number of ants running across a sheet of paper), Parks employees estimated the concentration of ants at each site. The results were then represented as total ants and incorporated into the shapefile ‘crazyant_grid.shp’.
In September 2003, Geoscience Australia projected the Crazy Ants shapefiles to the MGA (GDA94) projection using an XY shift (X=550015, Y=8780001).