Site Index: PCT 2nd Growth Suitable for Timber Harvest In Open FS-Roaded Areas, SE Alaska

Dec 9, 2014 (Last modified Feb 4, 2016)
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Description:
This dataset displays site index for PCT/CT second growth forest suitable for harvest within USFS-operable roaded areas on the Craig, Petersburg, Thorne Bay, Wrangell and Ketchikan-Misty Ranger Districts of the Tongass National Forest. 

Site index (the number of meters trees would be expected to grow in 50 years) is based on the "Transboundary Site Index Mapping" dataset, by Audubon Alaska (published 5/22/2012). Further information about this dataset can be found at the SE Alaska GIS Library website:http://seakgis.alaska.edu/data.

The Conservation Biology Institute determined site index for areas identified based on criteria specified by Mater Engineering and NRDC:

Areas within 800 feet of USFS-operable roads where 1. commercial and precommercial thinning have previously taken place 2. on acreage suitable for timber harvest with less than 72% slope (based on prior Forest Service analysis) 3. with null suitability values removed, 4. karst formations removed, 5. potential habitat conservation areas removed using Land Use Designations (“DESCRIPTION” = ‘Old Growth Habitat’), and 6. roadless areas removed (“CATEGORY” = '1B' or '1C').

USFS-operable roads meet the following criteria:
Route status = existing
Jurisdiction = Forest Service
System = NFSR 
Oper_Maint_Level of “2” and above, which excludes roads assigned “ 1 – Basic Custodial Care (Closed)”.

Note, commercially thinned areas, i.e. CT, aren't shown in the legend because these are believed to be PCT areas that were mis-categorized in the input dataset.
Data Provided By:
Tongass National Forest, Conservation Biology Institute, Audubon Alaska, The Nature Conservancy, U.S. Forest Service, Province of British Columbia, GeoBase, USGS, Glacier Bay National Park
Content date:
not specified
Citation:
"Transboundary Site Index Mapping" dataset, Audubon Alaska
Nathan Walker, GIS Biologist
Contact Organization:
Mater Engineering DBA Mater Limited; 
The Conservation Biology Institute
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Use Constraints:
Please cite Audubon Alaska and the data contributors listed in the Credits section in any products derived from these data. Data source constraints information provided below:VRI, BTM, and karst data:BC data is provided by the Province of British Columbia under the Open Government License for Government of BC Information v.BC1.0 (license information viewable at http://pub.data.gov.bc.ca/license/OGL-vbc1.0.pdf).Alaska land cover data:The Nature Conservancy shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any sale, distribution, loan, or offering for use of these digital data, in whole or in part, is prohibited without the approval of the Nature Conservancy. The use of these data to produce other GIS products and services with the intent to sell for a profit is prohibited without the written consent of the Nature Conservancy. All parties receiving these data must be informed of these restrictions. The Nature Conservancy shall be acknowledged as data contributors to any reports or other products derived from these data.Alaska land cover, harvest, site index data: The Forest Service uses the most current and complete data available. GIS data and product accuracy may vary. They may be developed from sources of differing accuracy; accurate only at certain scales; based on modeling or interpretation; incomplete while being created or revised; etc. Using GIS products for purposes other than those for which they were created, may yield inaccurate or misleading results. The Forest Service reserves the right to correct, update, modify or replace GIS products without notification. Any hardcopy or electronic products utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way, they are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent these data sets, nor to imply that the US Forest Service, Tongass National Forest approved the changes.Canadian Digital Elevation Dataset:The Licensee shall identify GeoBase® as a data source where any of the Data are redistributed, or contained within Derivative Products, and use of the Data shall not be construed as an endorsement by GeoBase® of those Derivative Products. License information viewable at : http://www.geobase.ca/geobase/en/licence.jsp;jsessionid=689CA83D172904F012EA27966A9C90E4National Elevation Data:None. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Glacier Bay National Park land cover data:The Information Resource does not contain any sensitive information. No copyrights or other ownership issues. There are no distribution restrictions based solely on the proprietary evaluation.
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Tags:
se alaska, site index, tongass national forest, 2nd growth, timber harvest
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Conservation Biology Institute

We provide advanced conservation science, technology, and planning to empower our partners in solving the world’s critical ecological challenges