Data · collection

Watershed Hydrologic Units for Alabama

Listed in NASA Earthdata CMR

Description

(Taken from 11-digit Hydrologic Unit for Alabama abstract, gsa.state.al.us/gsa/gsa.html This data set is a digital hydrologic unit boundary that is at the Watershed (11-digit) level for the State of Alabama. The data set was developed by delineating the boundary lines on base maps and digitizing the delineated lines. This data set consists of geo-referenced digital map data and attribute data.

The map data, which were captured from 7 1/2 minute quadrangles, comprise a seamless data layer for the entire State of Alabama. All land area within the state can be characterized uniquely as being contained in one and only one hydrologic unit boundary at the 11-digit level. The hydrologic unit ID code attached to each delineated polygon is linked to the attribute data.

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The Watershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. These smaller sized hydrologic units (up to 250,000 acres) are useful in many programs supported by federal and state agencies and others. These data are appropriate for use in GIS applications.

Topics

Stated by source: Drainage · Not provided · Watershed Boundaries · Watershed Characteristics
Inferred from text: Hydrology 71%

Provenance · 1 source records, 12 field assertions

Source	Key	Last seen	Raw
NASA Earthdata CMR	C1214608784-SCIOPS	14 d ago	JSON v1

Field	Assertion	Extractor	Evidence
access_level	source · NASA CMR	connector:nasa_cmr@1.0.0
concepts[field].anzsrc:group:3707	enrichment · NASA CMR	taxonomy-embedding@1.1.0	title+keywords+description (71%)
concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/surface-water/surface-water-processes-measurements/drainage	source · NASA CMR	connector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/surface-water/watershed-characteristics	source · NASA CMR	connector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/terrestrial-hydrosphere/surface-water/watershed-characteristics/watershed-boundaries	source · NASA CMR	connector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:not-provided	source · NASA CMR	connector:nasa_cmr@1.0.0
description	source · NASA CMR	connector:nasa_cmr@1.0.0	/umm/Abstract
license_text	source · NASA CMR	connector:nasa_cmr@1.0.0
spatial	source · NASA CMR	connector:nasa_cmr@1.0.0	/umm/SpatialExtent
temporal	source · NASA CMR	connector:nasa_cmr@1.0.0	/umm/TemporalExtents
title	source · NASA CMR	connector:nasa_cmr@1.0.0	/umm/EntryTitle
version_label	source · NASA CMR	connector:nasa_cmr@1.0.0

Open at cmr.earthdata.nasa.gov ↗

Access: open
License: Reproduction or redistribution of didgital data sets or products derived therefrom to a third party organization or entity is expressly forbidden. None of these data shall be electronically duplicated on magnetic or optical media for use by others, in whole or in part, without permission of the Geological Survey of Alabama. Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. Licensee specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by Geological Survey of Alabama. ADECA, ADEM, GSA, NRCS, and TVA should be acknowledged as the originators of the hydrologic unit boundaries. This data set is to be used as a primary reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the originators any authority for the decisions they make. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data.
Version: Not provided
Formats: ARCE (version 7.1.1)
Coverage: 1997-01-01 → 1997-12-31
Area: 30.194°–35.008° lat, -88.473°–-84.888° lon
Platforms: Not provided
Processing level: Not provided

CMR concept: C1214608784-SCIOPS
CMR short name: WATERSHED_ALABAMA.vNot provided

Watershed Hydrologic Units for Alabama

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