Table 1.

Field- and aircraft-based accuracy assessment of gold mining

Assessment variableMiningOtherTotal
Field-based*
 Mining761591
 Other136275
 Total8977166
Aircraft-based
 Mining76958827
 Other49624673
 Total8186821,500
  • For field-based validation, omission and commission errors are 15.7% and 18.1%, respectively. For aircraft-based observations, omission and commission errors are 5.9% and 7.1%, respectively.

  • * Field work coincided with mining in the 2011–2012 period.

  • Aircraft observations were centered on 2009 and 2011 mining activities.