Oil India Limited (OIL) has launched Airborne Gravity Gradiometry & Gravity Magnetics (AGG & GM) data for unapprised areas of Nagaland, Manipur, southern parts of Mizoram, Dima Hasao, parts of Arunachal Pradesh, Cauvery, Bastar, Satpura, Spiti-Zanskar and Karewa areas.