SRTM Water Body Data: SWBDW111N43N
Metadata also available as - [Questions & Answers] - [Parseable text] - [XML]
Metadata:
- Identification_Information:
-
- Citation:
-
- Citation_Information:
-
- Originator: U.S. Geological Survey (USGS)
- Publication_Date: 20081210
- Title: SRTM Water Body Data: SWBDW111N43N
- Online_Linkage: <http://earthexplorer.usgs.gov>
- Description:
-
- 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.
- Purpose:
-
DLGs depict information about geographic features on or near
the surface of the Earth, terrain, and political and administrative
units. These data were collected as part of the National Mapping
Program.
- Supplemental_Information:
-
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.
- Time_Period_of_Content:
-
- Time_Period_Information:
-
- Single_Date/Time:
-
- Calendar_Date: 20020201
- Currentness_Reference: Ground condition
- Status:
-
- Progress: In work
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
-
- Bounding_Coordinates:
-
- West_Bounding_Coordinate: -111
- East_Bounding_Coordinate: -110
- North_Bounding_Coordinate: 44
- South_Bounding_Coordinate: 43
- Data_Set_G-Polygon:
-
- Data_Set_G-Polygon_Outer_G-Ring:
-
- G-Ring_Point:
-
- G-Ring_Latitude: 44
- G-Ring_Longitude: -111
- G-Ring_Point:
-
- G-Ring_Latitude: 44
- G-Ring_Longitude: -110
- G-Ring_Point:
-
- G-Ring_Latitude: 43
- G-Ring_Longitude: -110
- G-Ring_Point:
-
- G-Ring_Latitude: 43
- G-Ring_Longitude: -111
- Keywords:
-
- Theme:
-
- Theme_Keyword_Thesaurus: None
- Theme_Keyword: National Imagery and Mapping Agency
- Theme_Keyword: Radar
- Theme_Keyword: JPL
- Theme_Keyword: NGA
- Theme_Keyword: Water Body
- Theme_Keyword: Elevation
- Theme_Keyword: SRTM
- Theme_Keyword: Mapping
- Access_Constraints: None
- 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.
- Point_of_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
- Contact_Person: lta@usgs.gov
- Contact_Position: Long Term Archive (LTA) Representative
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: Long Term Archive (LTA), U.S. Geological Survey (USGS)
- Address: Earth Resources Observation and Science (EROS) Center
- Address: 47914 252nd Street
- City: Sioux Falls
- State_or_Province: SD
- Postal_Code: 57198-0001
- Country: USA
- Contact_Voice_Telephone: 605-594-6151
- Contact_Electronic_Mail_Address: lta@usgs.gov
- Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT
- Contact_Instructions:
- Security_Information:
-
- Security_Classification_System: none
- Security_Classification: unclassified
- Security_Handling_Description: none
- Native_Data_Set_Environment: Oracle
- Data_Quality_Information:
-
- Attribute_Accuracy:
-
- Attribute_Accuracy_Report:
-
The identification of features is provided by the
distinct electromagnetic energy it emits,reflects, or otherwise transmits. This is
called the spectral signature. Other signatures such as tone (lightness or
darkness), texture (surface roughness or smoothness), pattern,shadow, shape, and
size are as important. Thus, through the use of the thematic mapper sensor, such
elements as water features, soils, and vegetation can be identified and distinguished from
each other.
- Logical_Consistency_Report: None given.
- Completeness_Report: None given.
- Lineage:
-
- Process_Step:
-
- Process_Description:
-
SRTM data were processed from raw radar echoes into
digital elevation models at the Jet Propulsion Laboratory (JPL) in Pasadena, CA.
These original data files had samples spaced ("posted") at intervals of 1
arc-second of latitude and longitude (about 30 meters at the equator). These data
were then edited by the National Geospatial Intelligence Agency (NGA, formerly the
National Imagery and Mapping Agency), and distributed as part of their DTED®
product set.
The editing, also referred to as finishing, consisted of delineating and flattening
water bodies, better defining coastlines, removing "spikes" and
"wells", and filling small voids. This "finished" set is publicly
available at two postings: 1 arc-second for the United States and its territories and
possessions, and 3 arc-seconds for regions between 60 degrees North and 56 degrees
South latitude.
- Process_Date: unknown
- Process_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: NGA
- Contact_Person: lta@usgs.gov
- Contact_Position: Long Term Archive (LTA) Representative
- Contact_Address:
-
- Address: Long Term Archive (LTA), U.S. Geological Survey (USGS)
- Address: Earth Resources Observation and Science (EROS) Center
- Address: 47914 252nd Street
- City: Sioux Falls
- State_or_Province: SD
- Postal_Code: 57198-0001
- Country: USA
- Contact_Voice_Telephone: 605-594-6151
- Contact_Electronic_Mail_Address: lta@usgs.gov
- Contact_Instructions: lta@usgs.gov
- Distribution_Information:
-
- Distributor:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
- Contact_Person: lta@usgs.gov
- Contact_Position: Long Term Archive (LTA) Representative
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: Long Term Archive (LTA), U.S. Geological Survey (USGS)
- Address: Earth Resources Observation and Science (EROS) Center
- Address: 47914 252nd Street
- City: Sioux Falls
- State_or_Province: SD
- Postal_Code: 57198-0001
- Country: USA
- Contact_Voice_Telephone: 605-594-6151
- Contact_Electronic_Mail_Address: lta@usgs.gov
- Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT
- Contact_Instructions: lta@usgs.gov
- Distribution_Liability:
-
Although these data have been processed successfully on
a computer system at the U.S. Geological Survey, no warranty expressed or implied is
made by the USGS regarding the use of the data on any other system, nor does the act
of distribution constitute any such warranty.
- Standard_Order_Process:
-
- Digital_Form:
-
- Digital_Transfer_Information:
-
- Format_Name: SRTM
- Format_Version_Number: 1
- Digital_Transfer_Option:
-
- Offline_Option:
-
- Offline_Media: Varies
- Recording_Format: Varies
- Fees:
-
Typically, all data available from USGS/EROS are downloadable at no cost
to the user. there are some cases when a service fee is required to convert the
analog film record to a digital file. This non-refundable fee is $30 per scene/frame.
- Ordering_Instructions: Consult the data sets product page for specific information.
- Turnaround:
-
A majority of the data are available for immediate downloading.
Specific data processing may take 24 to 48 hours and film scanning service requests
involving payment to USGS can require 3 - 4 weeks upon successful payment of the
request.
- Custom_Order_Process:
-
Limited from data set to data set. Please consult the data
sets product page for specific information.
- Technical_Prerequisites:
-
Adequate computer capability is the only technical
prerequisite for viewing data in digital form. You may return here at any time and
add to your data request before final submission.
- Metadata_Reference_Information:
-
- Metadata_Date: 20130520
- Metadata_Contact:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization:
-
U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
- Contact_Person: lta@usgs.gov
- Contact_Position: Long Term Archive (LTA) Representative
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: Long Term Archive (LTA), U.S. Geological Survey (USGS)
- Address: Earth Resources Observation and Science (EROS) Center
- Address: 47914 252nd Street
- City: Sioux Falls
- State_or_Province: South Dakota
- Postal_Code: 57198-0001
- Country: USA
- Contact_Voice_Telephone: 605-594-6151
- Contact_Electronic_Mail_Address: lta@usgs.gov
- Hours_of_Service: 0800 - 1600 CT, M-F, -6 h GMT
- Contact_Instructions: lta@usgs.gov
- Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998, Version 2
- Metadata_Time_Convention: local time
- Metadata_Access_Constraints: None
- Metadata_Use_Constraints: None
- Metadata_Security_Information:
-
- Metadata_Security_Classification_System: None
- Metadata_Security_Classification: Unclassified
- Metadata_Security_Handling_Description: None
Generated by mp version 2.9.21 on Tue May 21 20:49:04 2013