srtm_water_body_Not provided

SRTM Water Body Data

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  • Abstract
    The SRTM Water Body Data files are a by-product of the data editing performed by the National Geospatial-Intelligence Agency (NGA) to produce the finished SRTM Digital Terrain Elevation Data Level 2 (DTED® 2). In accordance with the DTED® 2 specification, the terrain elevation data have been edited to portray water bodies that meet minimum capture criteria. Ocean, lake and river shorelines were identified and delineated. Lake elevations were set to a constant value. Ocean elevations were set to zero. Rivers were stepped down monotonically to maintain proper flow. After this processing was done, the shorelines from the one arc second (approx. 30-meter) DTED® 2 were saved as vectors in ESRI 3-D Shapefile format. In most cases, two orthorectified image mosaics (one for ascending passes and one for descending passes) at a one arc second resolution were available for identifying water bodies and delineating shorelines in each 1 x1 cell. These were used as the primary source for water body editing. The guiding principle for this editing was that water must be depicted as it was in February 2000 at the time of the shuttle flight. A Landcover water layer and medium-scale maps and charts were used as supplemental data sources, generally as supporting evidence for water identified in the image mosaics. Since the Landcover water layer was derived mostly from Landsat 5 data collected a decade earlier than the Shuttle mission and the map sources had similar currency problems, there were significant seasonal and temporal differences between the depiction of water in the ancillary sources and the actual extent of water bodies in February 2000 in many instances. In rare cases, where the SRTM image mosaics were missing or unusable, Landcover was used to delineate the water in the SRTM cells. The DTED® header records for those cells are documented accordingly.

Data Identification Fields:

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    Processing Level

    Not provided

    Quality
    Collection Progress

    In Work

    Use Constraints
    There is no guarantee of warranty concerning the accuracy of these data. Users should be aware that temporal changes may have occurred since the data was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data set is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data set, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
    Access Constraints

    For information on how to cite USGS data plus guidance on usage restrictions, please see our Data Citations and Use page at https://lta.cr.usgs.gov/citation.

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    Science Keywords
    • EARTH SCIENCE
    • LAND SURFACE
    • EROSION/SEDIMENTATION
    • EROSION
    • EARTH SCIENCE
    • LAND SURFACE
    • LAND USE/LAND COVER
    • LAND USE/LAND COVER CLASSIFICATION
    • EARTH SCIENCE
    • LAND SURFACE
    • LANDSCAPE
    • REFORESTATION
    • EARTH SCIENCE
    • LAND SURFACE
    • SOILS
    • EARTH SCIENCE
    • LAND SURFACE
    • SURFACE RADIATIVE PROPERTIES
    • ALBEDO
    • EARTH SCIENCE
    • LAND SURFACE
    • GEOMORPHIC LANDFORMS/PROCESSES
    • EARTH SCIENCE
    • LAND SURFACE
    • TOPOGRAPHY
    • TERRAIN ELEVATION
    • EARTH SCIENCE
    • LAND SURFACE
    • TOPOGRAPHY
    • TOPOGRAPHIC EFFECTS
    • EARTH SCIENCE
    • LAND SURFACE
    • TOPOGRAPHY
    • TERRAIN ELEVATION
    • TOPOGRAPHICAL RELIEF MAPS
    • EARTH SCIENCE
    • LAND SURFACE
    • TOPOGRAPHY
    • EARTH SCIENCE
    • LAND SURFACE
    • TOPOGRAPHY
    • TERRAIN ELEVATION
    • CONTOUR MAPS
    • EARTH SCIENCE
    • OCEANS
    • COASTAL PROCESSES
Other Descriptive Keywords
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Ancillary Keywords
  • imagery
  • water body
  • EROS
ISO Topic Categories
  • IMAGERY/BASE MAPS/EARTH COVER
Additional Attributes
  • metadata.uuid
    STRING
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    Resolution Range Begin Range End Unit of Measure Accuracy

  • metadata.extraction_date
    STRING
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    Resolution Range Begin Range End Unit of Measure Accuracy

  • metadata.keyword_version
    FLOAT
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    Resolution Range Begin Range End Unit of Measure Accuracy

Acquisition Information Fields:

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Platforms
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    Instruments

Temporal Information Fields:

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN NO_SPATIAL
Location Keywords

Data Centers

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  • USGS EROS
    ORIGINATOR

    This data center does not have any addresses listed.

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  • DOI/USGS/EROS
    Multiple Roles

    ARCHIVER

    DISTRIBUTOR

    Earth Resources Observation and Science Center, U.S. Geological Survey, U.S. Department of the Interior

    This data center does not have any addresses listed.

    This data center does not have any contact mechanisms listed.

Data Contacts

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  • ANNIEPAT
    Metadata Author
    ANNIEPAT JOHNSON

    EROS
    Sioux Falls, SD 57198

  • ANNIEPAT
    Data Center Contact
    ANNIEPAT JOHNSON

    DOI/USGS/EROS

    EROS
    Sioux Falls, SD 57198

Collection Citations Fields:

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