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Data release of the influence of data characteristics on detecting wetland/stream surface-water connections in the Delmarva Peninsula, Maryland and Delaware

Metadata Updated: November 27, 2025

The datasets were generated for the Upper Choptank River Watershed (UCRW) in Maryland and Delaware. Depressions and the total stream network were derived from a lidar DEM collected during April to June 2003 (vertical accuracy root mean square error (RMSE) = 14.3 cm) and March to April 2006 (vertical accuracy RMSE = 18.5 cm) for Maryland (1 m resolution) and April 2007 (vertical accuracy RMSE = 18.5 cm) for Delaware (3 m resolution)). Depressions were identified using the Stochastic Depression Analysis Tool in Whitebox GAT. A random sample from the potential error values was iteratively added to the original DEM prior to depressions being filled and identified. Cells were considered part of a depression if identified as such in 80% of the 20 iterations. An edge preserving smoothing filter with a 3-pixel by 3-pixel window was applied to reduce noise, or random error, within the final depression raster. Depressions smaller than 50 m2 were removed. To map the stream network, flow accumulation was calculated on the filled lidar DEM using the FD8 flow accumulation algorithm. Flow accumulation was thresholded at 50,000 m2, a decision point guided by field-based points. Three Landsat images were used to create a surface-water extent map from Landsat including Landsat-8 images collected on April 4, 2015 (p14r33) and April 11, 2015 (p15r33) and a Landsat-7 ETM+ image collected on April 12, 2015 (p14r33). Surface-water was identified using the Matched Filtering algorithm. The output values were linearly stretched and a Frost filter with a 3-pixel by 3-pixel window was applied. Landsat pixels with a per-pixel fraction of >0.4 were classified as inundated.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date September 14, 2025
Metadata Updated Date November 27, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 14, 2025
Metadata Updated Date November 27, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-59370e80e4b0f6c2d0d899d5
Data Last Modified 2020-08-20T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-data.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
Harvest Object Id c3aa8f7c-67db-43ce-b92a-f46899964812
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Source Datajson Identifier True
Source Hash c5494265af3c2b8d715ff828e419e4f0b3b07c451ca4a784e35fd0d53b37d975
Source Schema Version 1.1

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