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The Grassland Encroachment indicator for TCA identifies areas in grasslands where conifer tree density has exceeded the levels presumed to be present in pre-Euro-American settlement non-forest vegetation. By our definition, non-forest areas cannot exceed 25%. This multidimensional dataset contains a single variable (encroachment) for assessment years 2020, 2022, and 2023.
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| summary:
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The Grassland Encroachment indicator for TCA identifies areas in grasslands where conifer tree density has exceeded the levels presumed to be present in pre-Euro-American settlement non-forest vegetation. By our definition, non-forest areas cannot exceed 25%. This multidimensional dataset contains a single variable (encroachment) for assessment years 2020, 2022, and 2023.
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| accessInformation:
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Reeves MC, Mitchell JE (2011) Extent of coterminous US rangelands: quantifying implications of differing agency perspectives. Rangel Ecol Manage 64:1–12 (https://research.fs.usda.gov/treesearch/41872); https://www.mlrc.gov/data; USDA; USFS; GO
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thumbnail/thumbnail.png
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5000
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| typeKeywords:
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["ArcGIS Server","Data","Image Service","Service"]
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| description:
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<div style='text-align:Left;'><div><div><p style='font-weight:bold;margin:0 0 11 0;'><a href='https://data.fs.usda.gov/geodata/rastergateway/TCA/TCA_Grassland_Encroachment.zip' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Direct Download (Raster Data Gateway)</span></span></a></p><p style='margin:0 0 13 0;'><span style='font-weight:bold;'><span>Objective:</span></span><span><span> </span></span><span><span>An indicator that identifies where tree density has exceeded the levels presumed to be present in pre-Euro-American settlement non-forest vegetation. By our definition, non-forest areas cannot exceed 25% tree canopy cover. Fire exclusion, climate, and human activities affect the progression of trees into non-forested ecosystems. Encroached areas may require restoration to meet ecological objectives. Restoration practices will be ecosystem specific.</span></span></p><p style='margin:0 0 13 0;'><span style='font-weight:bold;'><span>Data:</span></span><span><span> </span></span><span><span>The indicator uses areas identified as grasslands using LANDFIRE’s Biophysical Settings (BpS) raster dataset (US_140BPS_20180618) along with a cross-walk based on Reeves MC, Mitchell JE (2011) (https://research.fs.usda.gov/treesearch/41872) to identify BpS units that were likely to be grasslands during pre-European times. Presence of conifer tree species was developed using USGS National Landcover Database (NLCD) legend class “42 – Evergreen Forest”. The Evergreen Forest class represents “areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. More than 75% of the tree species maintain their leaves all year. Canopy is never without green foliage.” Grassland conifer encroachment is identified where raster pixels are identified as both “grasslands” and NLCD “Evergreen Forest”. In years when NLCD is not updated, data is reused from the previous year, which is why there is only data for 3 of the 5 assessment years from 2020-2024. NLCD versions used: NLCD 2011 (TCA Assessment 2020), NLCD 2019 (TCA Assessment 2022), NLCD 2021 (TCA Assessment 2023). Encroachment for the 2023 TCA Assessment is 1-bit and therefore only contains values of 1 indicating where encroachment was observed, rather than the binary data from other years.</span></span></p><p style='margin:0 0 13 0;'><span style='font-weight:bold;'><span>Format:</span></span><span><span> Raster data are binary: (1) likely encroached or (0) not encroached</span></span></p><p style='margin:0 0 13 0;'><span style='font-weight:bold;'><span>Resolution:</span></span><span><span> 250m</span></span></p><p style='margin:0 0 13 0;'><span style='font-weight:bold;'><span>Source: </span></span><a href='https://research.fs.usda.gov/treesearch/41872' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Custom grassland-BpS crosswalk</span></span></a><span><span>, </span></span><a href='https://www.mrlc.gov/data' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>NLCD conifer presence</span></span></a></p><p style='font-weight:bold;margin:0 0 11 0;'><span><span>Additional Resources:</span></span></p><p style='margin:0 0 11 0;'><span><span>Details on </span></span><a href='https://usfs.box.com/s/79vx1b42xg8u6ivjombxjes36nzfhgml' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Method Changes and Source Data Versions</span></span></a></p><p style='margin:0 0 11 0;'><span><span>Overview of the Terrestrial Condition Assessment: </span></span><a href='https://terrestrial-condition-assessment-usfs.hub.arcgis.com/' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>TCA Hubsite</span></span></a><span><span> or </span></span><a href='https://www.youtube.com/watch?v=Kf0P3cAq1rs&list=PLwRbAc4x5n94rLca1CXXuugtRDt_G666M&index=19' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Landfire Office Hour Presentation</span></span></a></p><p style='margin:0 0 11 0;'><span><span>Explore the results of the most recent assessment: </span></span><a href='https://apps.fs.usda.gov/gtac-toolsms/tca/' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>TCA Interactive Data Viewer</span></span></a></p><p><span><span>Learn more about the TCA KPI: </span></span><a href='https://cxodashboard.dl.usda.gov/t/NRE/views/EcologicalConditionOutcomes_17531128629260/EcologicalOutcomes' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>TCA Dashboard</span></span></a></p><p><span><span>*if you have trouble viewing the Dashboard, please submit a</span></span><span><span> </span></span><a href='https://usdagcc.sharepoint.com/sites/fs-wo-cdoc/SitePages/Dashboards.aspx' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>Tableau Viewer Access Request</span></span></a></p></div></div></div>
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<div style='text-align:Left;'><div><div><p><span>The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.</span></p><p><span>Additionally, the U.S. Forest Service waives copyright and related rights in the work worldwide through the CC0 (which can be found at https://creativecommons.org/public-domain/cc0/).</span></p><p><span>In accordance with Federal civil rights law and U.S. Department of Agriculture (USDA) civil rights regulations and policies, the USDA, its Agencies, offices, and employees, and institutions participating in or administering USDA programs are prohibited from discriminating based on race, color, national origin, religion, sex, disability, age, marital status, family/parental status, income derived from a public assistance program, political beliefs, or reprisal or retaliation for prior civil rights activity, in any program or activity conducted or funded by USDA (not all bases apply to all programs). Remedies and complaint filing deadlines vary by program or incident.</span></p><p><span>Persons with disabilities who require alternative means of communication for program information (e.g., Braille, large print, audiotape, American Sign Language, etc.) should contact the State or local Agency that administers the program or contact USDA through the Telecommunications Relay Service at 711 (voice and TTY). Additionally, program information may be made available in languages other than English.</span></p><p><span>To file a program discrimination complaint, complete the USDA Program Discrimination Complaint Form, AD-3027, found online at How to File a Program Discrimination Complaint and at any USDA office or write a letter addressed to USDA and provide in the letter all of the information requested in the form. To request a copy of the complaint form, call (866) 632-9992. Submit your completed form or letter to USDA by: (1) mail: U.S. Department of Agriculture, Office of the Assistant Secretary for Civil Rights, 1400 Independence Avenue, SW, Mail Stop 9410, Washington, D.C. 20250-9410; (2) fax: (202) 690-7442; or (3) email: program.intake@usda.gov.</span></p><p><span>USDA is an equal opportunity provider, employer, and lender.</span></p><p><span /></p></div></div></div>
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| catalogPath:
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| title:
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USFS_EDW_TCA_GrasslandEncroachment
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| type:
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Image Service
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| url:
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| tags:
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["TCA","Terrestrial Condition Assessment","Grassland","Encroachment","Geospatial Office","USFS"]
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| culture:
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en-US
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| portalUrl:
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| name:
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USFS_EDW_TCA_GrasslandEncroachment
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| guid:
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| minScale:
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150000000
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| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere
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