Drought and Moisture Surplus for the Conterminous United States, Annual Data 3-Year Windows (Image Service)

Metadata Updated: December 3, 2020

Note: To download this raster dataset, go to ArcGIS Open Data Set and click the download button, and under additional resources select raster download option. The Moisture Deficit and Surplus map uses moisture difference z-score datasets developed by scientists Frank Koch, John Coulston, and William Smith of the Forest Service Southern Research Station. A z-score is a statistical method for assessing how different a value is from the mean (average). Mean moisture values were derived from historical data on precipitation and potential evapotranspiration, from 1900 to 2019. The greater the z-value, the larger the departure from average conditions, indicating larger moisture deficits or surpluses. Thus, the dark red areas on this map indicate a one-year period with extremely dry conditions, relative to the average conditions over the past century. For further reading on the methodology used to build these maps, see the publication here: https://www.treesearch.fs.fed.us/pubs/43361

Access & Use Information

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

Downloads & Resources


Metadata Created Date December 3, 2020
Metadata Updated Date December 3, 2020

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date December 3, 2020
Metadata Updated Date December 3, 2020
Publisher U.S. Forest Service
Unique Identifier Unknown
Identifier https://data-usfs.hub.arcgis.com/datasets/d238ea9dcec24cb893db4e9bdbe10523
Data First Published 2019-10-17
Data Last Modified 2020-10-02
Category geospatial
Public Access Level public
Bureau Code 005:96
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Homepage URL https://data-usfs.hub.arcgis.com/datasets/d238ea9dcec24cb893db4e9bdbe10523
License https://data-usfs.hub.arcgis.com/datasets/d238ea9dcec24cb893db4e9bdbe10523/license.json
Metadata Type geospatial
Program Code 005:059
Source Datajson Identifier True
Source Hash be92c570f12c8a72461637c7ec0f6b1556582cd3
Source Schema Version 1.1
Spatial -125.0208,24.0625,-66.4792,49.9375

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