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Terrestrial Condition Assessment (TCA) Alaska Road Density (Image Service)
Direct Download (Raster Data Gateway)Objective: Identify locations where roads are present at a density that impacts the quality of wildlife habitat and fragments the landscape.Data: A national roads vector dataset has been acquired from the USGS National Transportation Dataset. The data were reattributed to represent three classes: (1) Unimproved, (2) Paved, (3) Light Duty roads. The new classes correspond to the following classes from the National Transportation Dataset: Unimproved: Four-wheel drive roads. Paved: Controlled access highway, Secondary Highway or Major Connecting Road, Ramps Light Duty: Local Connecting Roads, Local Roads Data Format: Polylines were converted to a raster for each TCA assessment year. The value at a pixel corresponds to the class of road at that location. Values differ slightly between the years due to data improvements and updated information from state and local sources:2024: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other2023: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other2022: 1- Light Duty, 2- Paved, 3- Unimproved2021: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other2020: 1- Light Duty, 2- Paved, 3- Unimproved, 4- OtherSpatial Resolution: 10mSource data: USGS National Transportation DatasetAdditional Resources:Details on Method Changes and Source Data VersionsOverview of the Terrestrial Condition Assessment: TCA Hubsite or Landfire Office Hour PresentationExplore the results of the most recent assessment: TCA Interactive Data ViewerLearn more about the TCA KPI: TCA Dashboard*if you have trouble viewing the Dashboard, please submit a Tableau Viewer Access Request
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[
"005:96"
]
|
| contactPoint |
{
"fn": "USFSEnterpriseContent",
"@type": "vcard:Contact",
"hasEmail": "mailto:SM.FS.data@usda.gov"
}
|
| description | <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/Alaska/03_RoadDensity/TCA_AK_Road_Density.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 11 0;'><span style='font-weight:bold;'><span>Objective:</span></span><span><span> Identify locations where roads are present at a density that impacts the quality of wildlife habitat and fragments the landscape.</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Data:</span></span><span><span> A national roads vector dataset has been acquired from the USGS National Transportation Dataset. The data were reattributed to represent three classes: (1) Unimproved, (2) Paved, (3) Light Duty roads. The new classes correspond to the following classes from the National Transportation Dataset: </span></span></p><ol><li><p style='margin:0 0 11 0;'><span><span>Unimproved: Four-wheel drive roads. </span></span></p></li><li><p style='margin:0 0 11 0;'><span><span>Paved: Controlled access highway, Secondary Highway or Major Connecting Road, Ramps </span></span></p></li><li><p style='margin:0 0 11 0;'><span><span>Light Duty: Local Connecting Roads, Local Roads </span></span></p></li></ol><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Data Format:</span></span><span><span> Polylines were converted to a raster for each TCA assessment year. The value at a pixel corresponds to the class of road at that location. Values differ slightly between the years due to data improvements and updated information from state and local sources:</span></span></p><p style='margin:0 0 11 0;'><span><span>2024: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other</span></span></p><p style='margin:0 0 11 0;'><span><span>2023: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other</span></span></p><p style='margin:0 0 11 0;'><span><span>2022: 1- Light Duty, 2- Paved, 3- Unimproved</span></span></p><p style='margin:0 0 11 0;'><span><span>2021: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other</span></span></p><p style='margin:0 0 11 0;'><span><span>2020: 1- Light Duty, 2- Paved, 3- Unimproved, 4- Other</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Spatial Resolution:</span></span><span><span> 10m</span></span></p><p style='margin:0 0 11 0;'><span style='font-weight:bold;'><span>Source data:</span></span><span><span> </span></span><a href='https://data.usgs.gov/datacatalog/data/USGS:ad3d631d-f51f-4b6a-91a3-e617d6a58b4e' style='text-decoration:underline;'><span style='text-decoration:underline;'><span>USGS National Transportation Dataset</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 style='margin:0 0 11 0;'><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 style='margin:0 0 11 0;'><span><span>*if you have trouble viewing the Dashboard, please submit a </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> |
| distribution |
[
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"title": "ArcGIS Hub Dataset",
"format": "Web Page",
"accessURL": "https://data-usfs.hub.arcgis.com/datasets/usfs::terrestrial-condition-assessment-tca-alaska-road-density-image-service",
"mediaType": "text/html"
},
{
"@type": "dcat:Distribution",
"title": "ArcGIS GeoService",
"format": "ArcGIS GeoServices REST API",
"accessURL": "https://imagery.geoplatform.gov/iipp/rest/services/Ecosystems/USFS_EDW_TCA_AK_RoadDensity/ImageServer",
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{
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"title": "ISO-19139 metadata",
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|
| identifier | https://www.arcgis.com/home/item.html?id=cfc4033d46ba471ab983c7b508885bf1 |
| issued | 2025-09-25 |
| keyword |
[
"AK",
"Alaska",
"Geospatial Office",
"Road density",
"Roads",
"TCA",
"Terrestrial Condition Assessment",
"USFS"
]
|
| landingPage | https://data-usfs.hub.arcgis.com/datasets/usfs::terrestrial-condition-assessment-tca-alaska-road-density-image-service |
| license | https://creativecommons.org/licenses/by/4.0/ |
| modified | 2025-09-25 |
| programCode |
[
"005:059"
]
|
| progressCode | onGoing |
| publisher |
{
"name": "U.S. Forest Service",
"source": "Forest Service"
}
|
| spatial | -152.0115,54.4409,-127.9753,61.2356 |
| theme |
[
"geospatial"
]
|
| title | Terrestrial Condition Assessment (TCA) Alaska Road Density (Image Service) |
