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Hydrogeologic framework top-surface altitude rasters for the Virginia Eastern Shore

Metadata Updated: January 7, 2026

In support of a groundwater-flow model of the Virginia Eastern Shore, altitudes were determined for the tops of hydrogeologic surfaces, including incised paleochannel surfaces, that compose the framework within the model area. Rasters were generated from the altitude data for the tops of the surficial aquifer, upper confining unit, upper aquifer, middle confining unit, middle aquifer, lower confining unit, lower aquifer, Saint Marys confining unit, paleochannel upper aquifer, paleochannel confining unit, and paleochannel lower aquifer (McFarland and Beach, 2019; McFarland, 2019). This data release includes the 11 rasters mentioned above for the Virginia Eastern Shore, in tiff format. Altitude contours from existing shapefiles in McFarland (2019) and Andreasen and others (2013) were the primary sources for unit top altitudes represented by the rasters. In the northern part of the study area, the surface altitude contours from Andreasen and others (2013) were used to supplement the contours from McFarland (2019). Topobathymetric data (Faunce and Rapp, 2020) were the source for development of the raster representing the top of the surficial aquifer.

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.

Downloads & Resources

Dates

Metadata Created Date January 7, 2026
Metadata Updated Date January 7, 2026

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date January 7, 2026
Metadata Updated Date January 7, 2026
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/USGS_66e4b65cd34e1cc1f894ef3d
Data Last Modified 2024-11-12T00:00:00Z
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 357817b5-4925-4bce-98c6-f4fddade7f99
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -76.2608, 37.0771, -75.0952, 38.1122
Source Datajson Identifier True
Source Hash 73f14b8ff877294386a159ce682dcd22ca2d316410d8714a9473ec377771a0be
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -76.2608, 37.0771, -76.2608, 38.1122, -75.0952, 38.1122, -75.0952, 37.0771, -76.2608, 37.0771}

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