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FreeGIS Project
The FreeGIS Project provides software overview on free Geographic Information Systems
Alaska Tidal Datum Portal
For Alaska's coastal communities, an understanding and awareness of local tidal datums is critical to assessing vulnerability and planning responses to coastal geohazards. The Alaska Tidal Datum Portal is provided by DGGS staff to assist users with: answers to common questions about tidal datums, tidal datum calculations, and links to additional information and authoritative data sources.

The links on this page are provided as a courtesy to help users find geology-related information for Alaska. Links are limited to other government entities and publicly-funded or non-profit organizations.