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The LakeCat Dataset: Accumulated Attributes for NHDPlusV2 (Version 2.1) Catchments for the Conterminous United States: Nonnative LANDFIRE Vegetation

Metadata Updated: February 5, 2025

This dataset represents the average height of the dominant vegetation for a 30-m grid cell within individual local and accumulated upstream catchments for NHDPlusV2 Waterbodies based on field reference data and Landsat, elevation, and ancillary data. Catchment boundaries in LakeCat are defined in one of two ways, on-network or off-network. The on-network catchment boundaries follow the catchments provided in the NHDPlusV2 and the metrics for these lakes mirror metrics from StreamCat, but will substitute the COMID of the NHDWaterbody for that of the NHDFlowline. The off-network catchment framework uses the NHDPlusV2 flow direction rasters to define non-overlapping lake-catchment boundaries and then links them through an off-network flow table. The Existing Vegetation Type (EVT) layer represents the species composition currently present at a given site. Vegetation map units are primarily derived from NatureServe's Ecological Systems classification, which is a nationally consistent set of mid-scale ecological units. Additional units are derived from NLCD, National Vegetation Classification Standard (NVCS) Alliances, and LANDFIRE specific types. - Reclassified into introduced managed vegetation cover - IntrodManagVeg class - reclass from EVT - groups (EVT_GP) = (701,702,703,704,705,706,707,708,709,711,731) Canopy height is generated separately for tree, shrub and herbaceous lifeforms using training data and other layers. EVH is determined by the average height weighted by species cover and based on the existing vegetation type (EVT) lifeform. Decision tree models using field reference data and Landsat, elevation, and ancillary data are developed separately for each lifeform. Decision tree relationships are used to generate lifeform specific height class layers, which are merged into a single composite EVH layer. The vegetation characteristics (%) were summarized to produce local catchment-level and watershed-level metrics as a continuous data type.

Access & Use Information

Public: This dataset is intended for public access and use. License: See this page for license information.

Downloads & Resources

References

https://www.epa.gov/node/276204
https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=B995906F-9B18-4B1F-B0D1-D13122A80C85

Dates

Metadata Created Date October 3, 2023
Metadata Updated Date February 5, 2025
Data Update Frequency R/P3Y

Metadata Source

Harvested from LakeCat Harvest

Additional Metadata

Resource Type Dataset
Metadata Created Date October 3, 2023
Metadata Updated Date February 5, 2025
Publisher U.S. Environmental Protection Agency, Office of Research and Development (ORD), Center for Public Health and Environmental Assessment (CPHEA), Pacific Ecological Systems Division (PESD),
Maintainer
Identifier B995906F-9B18-4B1F-B0D1-D13122A80C85
Data First Published 2015-04-23
Language en-US
Data Last Modified 2023-11-13
Rights public (Data asset is or could be made publicly available to all without restrictions)
Category environment
Public Access Level public
Data Update Frequency R/P3Y
Bureau Code 020:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://edg.epa.gov/data/Public/ORD/NHEERL/WED/NonGeo/LakeCat.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Data Quality True
Data Dictionary https://www.epa.gov/national-aquatic-resource-surveys/lakecat-metrics-and-definitions
Data Dictionary Type text/html
Harvest Object Id 81971f67-c7d0-4641-aa62-996876ed8e1d
Harvest Source Id 54618c4c-64b6-4a3b-9748-ad612299d8a0
Harvest Source Title LakeCat Harvest
Homepage URL https://www.epa.gov/national-aquatic-resource-surveys/lakecat-dataset
License https://edg.epa.gov/EPA_Data_License.html
Old Spatial -125.0,24.5,-66.5,49.5
Program Code 020:072
Related Documents https://www.epa.gov/node/276204, https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=B995906F-9B18-4B1F-B0D1-D13122A80C85
Source Datajson Identifier True
Source Hash 5415c6725093335fc6703964c1b71856823683855c739c49d5889c9f0af2482e
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -125.0, 24.5, -125.0, 49.5, -66.5, 49.5, -66.5, 24.5, -125.0, 24.5}
Temporal 2015/2030

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