Historical Vegetation Mapping Project

Land managers and researchers often want to know what a landscape looked like years ago, to compare how the ecology has changed, assess the rate of change, and make decisions about how to manage the area for the future.

The Institute for Natural Resources and its partners have created datasets of historical vegetation at both fine and coarse scales, using several different data sources. Read more and view coverages by clicking below or on the menu links at right.

• Historical vegetation based on General Land Office (GLO) and U.S. Coast Survey  (Scale: 1:24,000). GLO data integrated with U.S. Coast Survey topographic maps ("T-Sheets") where available.
• Oregon statewide composite historical vegetation (Scale: 1:100,000). A synthesis of data from several sources, including GLO coverage where available.