A lease is a legal document executed between a mineral owner and a company or individual that conveys the right to explore, develop and produce hydrocarbons and/or other products for a specified period of time over a given area. The source and official record are LAS case files available at http://dnr.alaska.gov/projects/las/. The lease case files available in this dataset were queried by case type specific to the division of oil and gas.

The codes used to query records contained in this dataset follow and descriptions are available from the Division of Oil and Gas.

Case Type Code: 783 - Oil & Gas Lease Non- Competitive, 784 - Oil & Gas Lease Competitive, 785 - Oil & Gas Transferred Federal Lease, 788 - Shoreland Preference Right Lease, 789 - Oil and Gas Shallow Natural Gas Lease, 790 - Oil and Gas Storage Lease.