SCAR Antarctic Digital Database (ADD) Version 7.0.
Downloaded 2016-2017 from: http://www.add.scar.org/

Seamless dataset for Antarctic rock outcrop, applicable to all zoom levels. A compendium of polygon data which should display well at all zoom levels.

High resolution data from ADD version 5 with minor consistency updates.
For even higher resolution, enable the layer "ADD Rock outcrop (high, Landsat8)" in the Geology group, also located as a file in Quantarctica\Geology\ADD\ADD_RockOutcrops_Landsat8.shp

Medium and low resolution data have generalisations of 100 m and 1 km respectively applied using ArcGIS.

For more information, see ADD_General.txt in this folder.