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Ecosystems/USFS_EDW_TCA_GrasslandEncroachment (ImageServer)

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Service Description:

Direct Download (Raster Data Gateway)

Objective: 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.

Data: 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.

Format: Raster data are binary: (1) likely encroached or (0) not encroached

Resolution: 250m

Source: Custom grassland-BpS crosswalk, NLCD conifer presence

Additional Resources:

Details on Method Changes and Source Data Versions

Overview of the Terrestrial Condition Assessment: TCA Hubsite or Landfire Office Hour Presentation

Explore the results of the most recent assessment: TCA Interactive Data Viewer

Learn more about the TCA KPI: TCA Dashboard

*if you have trouble viewing the Dashboard, please submit a Tableau Viewer Access Request

Name: Ecosystems/USFS_EDW_TCA_GrasslandEncroachment

Description:

Single Fused Map Cache: false

Extent:

Initial Extent:
    XMin: -1.42496443974E7
    YMin: 2595205.4488999993
    XMax: -7258894.397399999
    YMax: 6741955.448899999
    Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Full Extent:
    XMin: -1.42496443974E7
    YMin: 2595205.4488999993
    XMax: -7258894.397399999
    YMax: 6741955.448899999
    Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Time Info:
    Start Time Field: StdTime
    End Time Field: StdTime
    Time Extent:
      [2020/01/01 00:00:00 UTC, 2023/01/01 00:00:00 UTC]

    Time Reference: N/A
Pixel Size X: 30.0

Pixel Size Y: 30.0

Band Count: 1

Pixel Type: U4

RasterFunction Infos: {"rasterFunctionInfos": [ { "help": "", "name": "Grassland Encroachment", "description": "TCA Ind 12 Grassland Encroachment" }, { "help": "", "name": "None", "description": "Make a Raster or Raster Dataset into a Function Raster Dataset." }, { "help": "", "name": "Encroachment", "description": "A raster function template." } ]}

Mensuration Capabilities: Basic

Inspection Capabilities:

Has Histograms: true

Has Colormap: false

Has Multi Dimensions : true

Rendering Rule:

Min Scale: 0

Max Scale: 0

Copyright Text: 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

Service Data Type: esriImageServiceDataTypeGeneric

Min Values: 1

Max Values: 1

Mean Values: 1

Standard Deviation Values: 0

Object ID Field: objectid

Fields:
  • objectid ( alias: objectid , type: esriFieldTypeOID )
  • name ( length: 200 , alias: name , type: esriFieldTypeString )
  • minps ( alias: minps , type: esriFieldTypeDouble )
  • maxps ( alias: maxps , type: esriFieldTypeDouble )
  • lowps ( alias: lowps , type: esriFieldTypeDouble )
  • highps ( alias: highps , type: esriFieldTypeDouble )
  • category ( alias: category , type: esriFieldTypeInteger , Coded Values: [0: Unknown] , [1: Primary] , [2: Overview] , ...6 more... )
  • tag ( length: 100 , alias: tag , type: esriFieldTypeString )
  • groupname ( length: 100 , alias: groupname , type: esriFieldTypeString )
  • productname ( length: 100 , alias: productname , type: esriFieldTypeString )
  • centerx ( alias: centerx , type: esriFieldTypeDouble )
  • centery ( alias: centery , type: esriFieldTypeDouble )
  • zorder ( alias: zorder , type: esriFieldTypeInteger )
  • shape ( alias: shape , type: esriFieldTypeGeometry )
  • encroachment ( length: 24 , alias: encroachment , type: esriFieldTypeString )
  • year ( length: 8 , alias: year , type: esriFieldTypeDate )
  • stdtime ( length: 8 , alias: Standard Time , type: esriFieldTypeDate )
  • dimensions ( length: 50 , alias: Dimensions , type: esriFieldTypeString )
  • variable ( length: 50 , alias: Variable , type: esriFieldTypeString )
  • st_area(shape) ( alias: st_area(shape) , type: esriFieldTypeDouble )
  • st_perimeter(shape) ( alias: st_perimeter(shape) , type: esriFieldTypeDouble )
Default Mosaic Method: ByAttribute

Allowed Mosaic Methods: ByAttribute,NorthWest,Center,LockRaster,Nadir,Viewpoint,Seamline,None

SortField: StdTime

SortValue: 0

Mosaic Operator: First

Default Compression Quality: 75

Default Resampling Method: Nearest

Max Record Count: 1000

Max Image Height: 100000

Max Image Width: 100000

Max Download Image Count: 20

Max Mosaic Image Count: 20

Allow Raster Function: true

Allow Copy: true

Allow Analysis: true

Allow Compute TiePoints: false

Supports Statistics: true

Supports Advanced Queries: true

Use StandardizedQueries: true

Raster Type Infos:
    Name: Raster Dataset
    Description: Supports all ArcGIS Raster Datasets
    Help:
Has Raster Attribute Table: false

Edit Fields Info: N/A

Ownership Based AccessControl For Rasters: N/A

Child Resources:   Info   Histograms   Statistics   Key Properties   Legend   Raster Function Infos   Multidimensional Info   Slices

Supported Operations:   Export Image   Query   Identify   Measure   Compute Histograms   Compute Statistics Histograms   Get Samples   Compute Class Statistics   Query GPS Info   Find Images   Image to Map   Map to Image   Measure from Image   Image to Map Multiray   Query Boundary   Compute Pixel Location   Compute Angles   Validate   Project