Terrestrial Condition Assessment (TCA) Vegetation Departure

<div style='text-align:Left;'><div><div><p><a target='_blank' href='https://data.fs.usda.gov/geodata/rastergateway/TCA/TCA_Vegetation_Departure.zip' rel='nofollow ugc noopener noreferrer'><span><strong><u>Direct Download (Raster Data Gateway)</u></strong></span></a></p><p><span><strong>Objective:</strong> Identify locations where vegetation composition and successional stage are departed from the natural range of variation.</span></p><p><span><strong>Data:</strong> Vegetation departure within a TCA landscape ecosystem describes the degree to which the observed proportion (percent, 0-100%) of successional classes (i.e., A through E) derived from Landfire Succession Classes (SClass) dataset, is departed from the proportions one would expect based on the reference condition contained in the Landfire Biophysical Settings (BpS) dataset at each cell location. Departure is calculated as:</span></p><p><span>Departure = 100 – Similarity</span></p><p><span>where Similarity = ∑ (min(Ai,Bi)) over all classes i,…n</span></p><p><span>Departure is determined for each BPS within an LTA, and then weighted average for departure is calculated for the LTA based on the areal extent of the BPS. After being added to the assessment in 2022, the update timeline of the input source data from LANDFIRE did not align with the timing of TCA assessment in 2023, so data from 2022 was reused. The 2024 TCA Assessment used updated source data to create new vegetation departure indicator data.</span></p><p><span><strong>Units: </strong>Percent</span></p><p><span><strong>Format:</strong> Raster data are continuous</span></p><p><span><strong>Resolution:</strong> 30m</span></p><p><span><strong>Source: </strong>Landfire </span><a target='_blank' href='https://www.landfire.gov/vegetation/sclass' rel='nofollow ugc noopener noreferrer'><span><u>Succession Class</u></span></a><span> and </span><a target='_blank' href='https://www.landfire.gov/vegetation/bps' rel='nofollow ugc noopener noreferrer'><span><u>Biophysical Setting</u></span></a><span>, methods from </span><a target='_blank' href='https://www.mdpi.com/2073-445X/11/1/28' rel='nofollow ugc noopener noreferrer'><span><u>Swaty et al. 2022</u></span></a></p><p><span><strong>Additional Resources:</strong></span></p><p><span>Details on </span><a target='_blank' href='https://usfs.box.com/s/79vx1b42xg8u6ivjombxjes36nzfhgml' rel='nofollow ugc noopener noreferrer'><span><u>Method Changes and Source Data Versions</u></span></a></p><p><span>Overview of the Terrestrial Condition Assessment: </span><a target='_blank' href='https://terrestrial-condition-assessment-usfs.hub.arcgis.com/' rel='nofollow ugc noopener noreferrer'><span><u>TCA Hubsite</u></span></a><span> or </span><a target='_blank' href='https://www.youtube.com/watch?v=Kf0P3cAq1rs&amp;list=PLwRbAc4x5n94rLca1CXXuugtRDt_G666M&amp;index=19' rel='nofollow ugc noopener noreferrer'><span><u>Landfire Office Hour Presentation</u></span></a></p><p><span>Explore the results of the most recent assessment: </span><a target='_blank' href='https://apps.fs.usda.gov/gtac-toolsms/tca/' rel='nofollow ugc noopener noreferrer'><span><u>TCA Interactive Data Viewer</u></span></a></p><p><span style='font-family:&quot;Calibri&quot;,sans-serif;'>Learn more about the TCA KPI: </span><a target='_blank' href='https://cxodashboard.dl.usda.gov/t/NRE/views/EcologicalConditionOutcomes_17531128629260/EcologicalOutcomes' rel='nofollow ugc noopener noreferrer'><span style='font-family:&quot;Calibri&quot;,sans-serif;'><u>TCA Dashboard</u></span></a></p><p><span style='font-family:&quot;Calibri&quot;,sans-serif;'>*if you have trouble viewing the Dashboard, please submit a </span><a target='_blank' href='https://usdagcc.sharepoint.com/sites/fs-wo-cdoc/SitePages/Dashboards.aspx' rel='nofollow ugc noopener noreferrer'><span style='font-family:&quot;Calibri&quot;,sans-serif;'><u>Tableau Viewer Access Request</u></span></a></p></div></div></div>

Tags: composition, departure, geospatial-office, similarity, succession, tca, terrestrial-condition-assessment, usfs, vegetation
Organization: Department of Agriculture