• Organization: National Archives and Records Administration
• Updated: 2012-04-02

Website alows the public full access to the 1940 Census images, census maps and descriptions.

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• Organization: District of Columbia
• Updated: 2018-01-05T00:00:00.000Z

Census Year 1940 Census Tracts. The dataset contains polygons representing CY 1940 census tracts, created as part of the D.C. Geographic Information System (DC GIS) for the D.C. Office of the...

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• Organization: U.S. Environmental Protection Agency
• Updated: 2016-08-02T00:00:00.000+00:00

This map shows percentage changes in the minimum annual rate of water carried by rivers and streams across the country, based on the long-term rate of change from 1940 to 2022. For more...

• Organization: Department of the Interior
• Updated: 2024-01-08T16:35:00Z

FIRE1940_POLY: A series of four maps showing the state of forests in the northern coastal area of Oregon. They show the change in stand age over time due to fires. This dataset shows conditions in 1940.

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• Organization: Department of the Interior
• Updated: 2021-08-12T00:00:00Z

Ecological flow (EFlow) statistics have been designated to characterize the magnitude, frequency, and duration of extreme high- and low-flows, the timing of seasonal flows, and the consistency of...

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• Organization: State of Connecticut
• Updated: 2024-08-12

Conn Doc Ed83bu To access dataset select the "Data" tab. To view original files please contact the Connecticut State Library at 860-757-6500. The Connecticut State Library has a collection of...

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• Organization: Department of the Interior
• Updated: 2022-08-05T00:00:00Z

This product is a 100-meter resolution raster which classifies urban lands in the conterminous United States by the year in which they were “first developed.” The classification is based on...

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• Organization: Department of the Interior
• Updated: 2021-08-12T00:00:00Z

This Child Item contains (1) a table of trends in eight annual streamflow statistics for the time periods 1940-1969, 1970-1999, and 2000-2018, and (2) a .zip file of plots of the eight statistical...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2001-10-29T00:00:00.000+00:00

GIS representations of 1940 Historical seagrass coverage in Perdido Bay from United States Geological Survey/National Wetlands Research Center (USGS/NWRC).

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This data set contains precipitation data originally recorded in log books at 65 Russian coastal and island meteorological stations, and later digitized at the Arctic and Antarctic Research...

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• Organization: Department of the Interior
• Updated: 2021-11-10T00:00:00Z

The U.S. Geological Survey (USGS), in cooperation with the Oklahoma Water Resources Board, produced this data release that includes vector and raster geographic information systems layers used in...

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• Organization: City of Providence
• Updated: 2013-11-27

Abstract: This digitized collection contains approximately 90,000 images of Residential Assessment Records (a.k.a. “field cards”) created by the Tax Assessors Department of the City of Providence,...

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• Organization: Department of the Interior
• Updated: 2020-10-13T00:00:00Z

Aerial_WDL_Shorelines.zip features digitized historic shorelines for the Dauphin Island coastline from October 1940 to November 2015. This dataset contains 10 Wet Dry Line (WDL) shorelines...

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• Organization: State of Connecticut
• Updated: 2024-07-22

Conn Doc Ed83cu To access dataset select the "Data" tab. To view original files please contact the Connecticut State Library at 860-757-6500. The Connecticut State Library has a collection of...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

This data set provides annual spatial patterns of cropland, natural pasture, and planted pasture land uses across Amazonia for the period 1940/1950-1995. Two series of 5-minute grid cell...

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• Organization: Department of the Interior
• Updated: 2023-08-02T00:00:00Z

This tabular data set contains information on historic housing densities for every 10 years from 1940-2010, compiled for two spatial components of the NHDPlus version 2 data suite (NHDPlusv2) for...

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• Organization: Department of the Interior
• Updated: 2021-08-12T00:00:00Z

The hydrologic regime of rivers and streams is a major determinant of habitat quality for fish and aquatic invertebrates. Long-term streamflow data were compiled and multidecadal streamflow trends...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 2017-05-12T00:00:00.000+00:00

Historic black and white aerial photographs of coastal Alabama (Mobile Bay and adjacent waters) from 1940, 1955, and 1966 were digitized and georeferenced using Blue Marble Geographic Transformer...

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• Organization: Department of the Interior
• Updated: 2023-05-08T00:00:00Z

Presented is a list of voltages (electric potential differences) measured during magnetic storms on grounded long lines in the United States and Canada between 1891 and 1940. The sources for the...

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• Organization: National Aeronautics and Space Administration
• Updated: 2026-02-10

There is one comma-separated (.csv) data file and one text (.txt) file (bibliographic information) with this data set. This data set provides above-ground net primary production (ANPP) and total...

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