USFS/State and Private Forestry and USGS Alaska Geographic Science Office
Forest Health Monitoring Clearinghouse
Table of Contents
- The objective of this project is to develop a spatial resource
data base of forest health related information for use by Alaska land managers
and the science community. Alaska has over 129 million acres of forest land,
yet the state is virtually inaccessible with less than 4000 miles of roads
and ownership intermixed in large blocks. These facts make coordinated information
gathering and sharing difficult. However, Alaska has many positive aspects
for coordinated information sharing including excellent working relationships
among Federal and state agencies and major land owners. Currently many
land managing agencies and owners are creating GIS data bases. These efforts
are to be linked and built upon to further enhance the data base for all
- The site will provide a comprehensive geospatial framework
for forest health monitoring in Alaska. The site will be a central location
for providing insect, disease and other pertinent forest resource information
needed to address Alaska's changing forest conditions. A number of agencies
have contributed data to this site, including the State of Alaska Department
of Natural Resources (DNR) and Division of Forestry, the U.S. Geological
Survey (USGS), the U.S. Forest Service (USFS) and the Alaska Fire Service
(AFS) of the Bureau of Land Management (BLM). The data meet FGDC meta-data
standards, and is managed at appropriate scales to provide useful projection,
map products, and analysis output to Alaska land managers and researchers.
If you have related or additional datasets appropriate for this site, please
contact firstname.lastname@example.org. Contributions
of data or links are welcome.
For each dataset, some type of reference information is given,
either a [Link] to an information page by the contributing agency,
a reference publication for the data, and/or a contact for questions on the
specific dataset. A [Metadata] button is available to view the metadata
file. A short summary of the metadata, usually just one page, is available
as a ASCII file [Metatxt] for some datasets. A small quicklook image
is also available for some datasets using the [GIF] button. The datasets
are either raster or vector format, depending on how they were developed.
Most vector datasets are available, with projection information, in both
[Shape] (.SHP) and [ARCExport] (.e00) formats. The raster
datasets are available in basic image band interleave by line [.BIL]
and/or [GRIDExport] (.e00) formats. The raster datasets contain all
necessary image-related files to be ingested, with georeferencing, by ARC/GRID
and LAS, or can be read by almost image processing software packages. Most
data files have been compressed with gzip to facilitate data transfer.
- To retrieve via ftp the dataset for a variable, select the
appropriate [Format] button. For each variable, the format (raster
or vector), data type (byte or integer) and approximate size when compressed
is given. Those who have problems downloading the data, or questions about
the data, contact the Web Master.
- Most datasets are available for the entire forested area, if not almost
complete coverage of the state of Alaska. Unless otherwise stated, all datasets
are statewide coverages (except the western end of the Aleutian Islands)
and are in a standard statewide Albers Equal Area Projection. Raster datasets
are at a resolution of 1km, with each grid 1992 lines by 2512 samples. Vector
data resolution is dependent on the data source.
- Vegetation and Related.
Statewide Vegetation/Land Cover. Vegetation map of Alaska, 23 classes, 19 vegetated, raster format.
The classification was developed by Michael Fleming using the phenology
of a vegetation index (AVHRR/NDVI) collected during the 1991 growing season.
[.BIL] (Byte, 300k).
[GRIDExport] (Integer, 898k).
Ecoregions. Three datasets developed to stratify
the state into major ecologically related zones.
Unified EcoRegions of Alaska:
2001 This ecoregion map is an attempt to combine the Bailey and Omernik
approaches to ecoregion mapping in Alaska. The ecoregions were developed
cooperatively by the USFS, NPS, USGS, The Nature Conservancy and many personnel
from many other agencies and private companies. Hard copy maps are available
at ESIC offices for $7.
The Ecomap was developed by the U.S. Forest Service following the Bailey
approach to ecoregion mapping, see their web site for more information on
the Ecological Regions of the United States
[LINK]. The dataset contained here is the Nowacki/Brock
version of the ecoregions of Alaska.
- EcoRegions: 1996 The Ecoregions map was developed
cooperatively by the USGS, Environmental Protection Agency, and Colorado
State University following the Omernik approach to ecoregions mapping. Published
as USGS Professional Paper 1567, by Gallant, Binnian, Omernik and Shasby,
- Wetlands Inventory. Data for Alaska from the National Wetland Inventory (NWI).
[Status] image shows the status of the NWI mapping effort in the state.
[TXT] file contains more detailed information on the status of
each quadrangle as of 7/15/98. The U.S. Fish & Wildlife Service (FWS)
maintains the national data archive on the [NWI] web site
[ARC] formats. There is one
[Metadata] file for the entire dataset.
- Timber Harvest & Other Disturbances.
Datasets indicating areas of the state disturbed
by timber harvest.
- Insects & Disease.
Historical record of insects and disease infested areas in the state from
the DNR/USFS yearly aerial surveys. Yearly datasets are available from 1989
to 2010 with up to 25 percent of the state surveyed each year. The flight line layers show the flight routes along which forest damage was assessed. The Alaska
Department of Natural Resources, Division of Forestry and the Forest Service's Forest Health Protection web sites can offer more insight into these datasets and current forest health conditions in the state. These data can also be acquired at the Alaska State Geo-Spatial Data Clearing house.
- Fire Related.
Datasets maintained and provided by the Alaska Fire Service (AFS)/BLM,
Fairbanks, Alaska. See the
[AFS] web pages for a number of statewide fire related datasets.
The Fire History, Fire Management Boundaries, and Fire Protection Boundaries
datasets listed below are the 1999 editions of these datasets, and are in
an Albers Projection. More current versions of these datasets are available
Format (Digital Degrees).
- Other Useful Datasets.
Elevation, in meters above sea level on a 1km grid. Compiled from USGS
3x6 arcsecond DEM's of the state, 1950's vintage DMA data.
[GRIDExport] (Integer, 3.6Mb).
[.BIL] (Integer, 2.2Mb).
The USGS 1:2,000,000 DLG hydrology stream network of Alaska, 1982
[Metatxt] [Metadata] [GIF]
- Land Status/Ownership. Land ownership and the land status as of Nov 1997. The
database is compiled and maintained by BLM and Alaska State DNR. Contact
the state [DNR]
for the latest update (updated weekly).
[Metatxt] [Metadata] [GIF]
Permafrost map of Alaska. By O.J. Ferrians, 1965, U.S. Geological
Survey Miscellaneous Geologic Investigations Map 1-445.
- Soils: 1996.
The STATSGO soil survey of Alaska, appropriate at a scale of 1:1,000,000.
Developed by the U.S. Department of Agriculture Natural Resource Conservation
Service, Anchorage. Includes STATSGO relational
[Tables] (226Kb) for the soil classification.
Geology. A surficial geology of Alaska, compiled
by N.V. Karlstrom, et.at. 1964 and published by the USGS as a Miscellaneous
Geologic Investigations Map I-357 at 1:1,584,000.
[Metadoc] [Metadata] [GIF]
[Moraines (shape)] (98Kb).
Geology. The 1980 Geologic Map of Alaska compiled
by H.M. Beikman and published by the USGS as a Special Map at 1:2,500,000.
[Metatxt] [Metadata] [GIF]
- Other sites with information and/or data relative to this project.
- USDA Forest Service.
- Alaska Geospatial Data Clearinghouse.
- Bureau of Land Management
- Interagency Efforts
State and Local