USGS NED ned19_n40x00_w104x50_co_denvercity_2008 1/9 arc-second 2009 15 x 15 minute IMG

Identification Information:
Citation:
Citation Information:
Originator: U.S. Geological Survey
Publication Date: 2009
Title: USGS NED ned19_n40x00_w104x50_co_denvercity_2008 1/9 arc-second 2009 15 x 15 minute IMG
Geospatial Data Presentation Form: raster digital data
Publication Information:
Publication Place: Reston, VA
Publisher: U.S. Geological Survey
Online Linkage: http://ned.usgs.gov/
Online Linkage: http://nationalmap.gov/viewer.html
Larger Work Citation:
Citation Information:
Originator: U.S. Geological Survey
Publication Date: 2014
Title: National Elevation Dataset (NED) 1/9 arc-second
Online Linkage: https://www.sciencebase.gov/catalog/item/4f70aac4e4b058caae3f8de7
Description:
Abstract: This tile of the National Elevation Dataset (NED) is 1/9 arc-second resolution. The National Elevation Dataset (NED) serves the elevation layer of The National Map, and provides basic elevation information for earth science studies and mapping applications in the United States. Scientists and resource managers use NED data for global change research, hydrologic modeling, resource monitoring, mapping and visualization, and many other applications. The NED is an elevation dataset that consists of seamless layers and a high resolution layer. Each of these layers are composed of the best available raster elevation data of the conterminous United States, Alaska, Hawaii, territorial islands, Mexico and Canada. The NED is updated continually as new data become available. All NED data are in the public domain. The NED are derived from diverse source data that are processed to a common coordinate system and unit of vertical measure. These data are distributed in geographic coordinates in units of decimal degrees, and in conformance with the North American Datum of 1983 (NAD 83). All elevation values are in meters and, over the continental United States, are referenced to the North American Vertical Datum of 1988 (NAVD 88). The vertical reference will vary in other areas. NED data are available nationally (except for Alaska) at resolutions of 1 arc-second (approx. 30 meters) and 1/3 arc-second (approx. 10 meters), and in limited areas at 1/9 arc-second (approx. 3 meters). In most of Alaska, only lower resolution source data are available. As a result, most NED data for Alaska are at 2-arc-second (approx. 60 meters) grid spacing. Part of Alaska is available at the 1- and 1/3-arc-second resolution from IFSAR collections starting in 2010. Plans are in place for collection of statewide IFSAR in Alaska through 2016.
Purpose: The NED serves as the elevation layer of The National Map, and provides basic elevation information for earth science studies and mapping applications in the United States. The data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping and visualization applications.
Supplemental Information: This tile of the National Elevation Dataset (NED) is 1/9 arc-second resolution, Image file format, and covers a one degree block. The geographic area of coverage is described below in the Bounding Coordinates. Additional information for the NED may be found on http://ned.usgs.gov/. Data may be downloaded through The National Map Viewer: http://nationalmap.gov/viewer.html. Direct links for direct access by automated services are provided in the Distribution section of this metadata.; {"gdaId" : 6031221}
Time Period of Content:
Time Period Information:
Multiple Dates/Times:
Single Date/Time:
Calendar Date: 20080325
Single Date/Time:
Calendar Date: 20080326
Single Date/Time:
Calendar Date: 20080327
Single Date/Time:
Calendar Date: 20080329
Single Date/Time:
Calendar Date: 20080402
Single Date/Time:
Calendar Date: 20080409
Single Date/Time:
Calendar Date: 20080414
Single Date/Time:
Calendar Date: 20080415
Single Date/Time:
Calendar Date: 20080416
Single Date/Time:
Calendar Date: 20080417
Single Date/Time:
Calendar Date: 20080418
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -104.50018518518522
East Bounding Coordinate: -104.24981481481484
North Bounding Coordinate: 40.000185185185188
South Bounding Coordinate: 39.749814814814819
Keywords:
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Category
Theme Keyword: elevation
Theme:
Theme Keyword Thesaurus: NGDA Portfolio Themes
Theme Keyword: Elevation
Theme:
Theme Keyword Thesaurus: National Elevation Dataset (NED)
Theme Keyword: National Elevation Dataset
Theme Keyword: NED
Theme Keyword: Elevation
Theme Keyword: Grid
Theme Keyword: LIght Detection And Ranging
Theme Keyword: LIDAR
Theme Keyword: Interferometric Synthetic Aperture Radar
Theme Keyword: IFSAR
Theme Keyword: High Resolution
Theme Keyword: Topographic Surface
Theme Keyword: Topography
Theme Keyword: Bare Earth
Theme Keyword: Hydro-Flattened
Theme Keyword: Terrain Elevation
Theme Keyword: 15-minute DEM
Theme Keyword: 1/9 arc-second DEM
Theme Keyword: Cartography
Theme Keyword: DEM
Theme Keyword: Digital Elevation Model
Theme Keyword: Digital Mapping
Theme Keyword: Digital Terrain Model
Theme Keyword: Geodata
Theme Keyword: GIS
Theme Keyword: Mapping
Theme Keyword: Raster
Theme Keyword: USGS
Theme Keyword: U.S. Geological Survey
Theme:
Theme Keyword Thesaurus: The National Map Type Thesaurus
Theme Keyword: Downloadable Data
Theme:
Theme Keyword Thesaurus: The National Map Theme Thesaurus
Theme Keyword: Elevation
Theme:
Theme Keyword Thesaurus: The National Map Collection Thesaurus
Theme Keyword: National Elevation Dataset (NED) 1/9 arc-second
Theme Keyword: National Elevation Dataset (NED)
Theme:
Theme Keyword Thesaurus: The National Map Product Extent Thesaurus
Theme Keyword: 15 x 15 minute
Theme:
Theme Keyword Thesaurus: The National Map Product Format Thesaurus
Theme Keyword: IMG
Place:
Place Keyword Thesaurus: Geographic Names Information System
Place Keyword: US
Place Keyword: United States
Access Constraints: None. Any downloading and use of these data signifies a user's agreement to comprehension and compliance of the USGS Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests.
Use Constraints: There is no guarantee or warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since these data were 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 its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the USGS. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Browse Graphic:
Browse Graphic File Name: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/19/IMG/ned19_n40x00_w104x50_co_denvercity_2008_thumb.jpg
Browse Graphic File Description: Thumbnail JPG image
Browse Graphic File Type: JPEG
Data Set Credit: Acknowledgement of the originating agencies would be appreciated in products derived from these data.
Data Quality Information:
Logical Consistency Report: N/A
Completeness Report: N/A
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: N/A
Vertical Positional Accuracy:
Vertical Positional Accuracy Report: N/A
Lineage:
Process Step:
Process Description: USGS NED ned19_n40x00_w104x50_co_denvercity_2008 1/9 arc-second 2009 15 x 15 minute IMG. "Data Collection: Using a Leica ALS50 Light Detection And Ranging (LiDAR) system, 145 flight lines of high density (0.7 meter ground sample distance) data were collected over areas in the Denver Metropolitan Region (approximately 947 square miles). Multiple returns were recorded for each laser pulse along with an intensity value for each return. The data acquisition occurred between March 15, 2008 and April 19, 2008. During the LIDAR campaign, the Sanborn field crew conducted a GPS field survey to establish final coordinates of the ground base stations for final processing of the base-remote GPS solutions." Information in quotation marks is from the original metadataMetadata was created for display through The National Map Viewer at http://nationalmap.gov/viewer.html in XML format.
Process Step:
Process Description: "Airborne GPS Processing: Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The overlap between flight lines was removed to provide a homogeneous coverage, and the coverage was classified to extract a bare earth digital elevation model (DEM). Airborne GPS is differentially processed using the GrafNAV V7.50 software by Waypoint Consulting of Calgary, Alberta, Canada. The PDOP and distance separation is as follows: IMU data is processed using the PosProc V4.3 software by Applanix Corporation of Richmond Hill, Ontario, Canada. The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia. The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helinski, Finland."
Process Step:
Process Description: "IMU data Processing: IMU data provides information concerning roll, pitch and yaw of collection platform during collection event. IMU information allows the pulse vector to be properly placed in 3D space allowing the distance from the aircraft reference point to be properly positioned on the elevation model surface. IMU data is processed using the PosProc V4.3 software by Applanix Corporation of Richmond Hill, Ontario, Canada."
Process Step:
Process Description: "LiDAR Calibration: Sanborn performs two types of calibrations on its LiDAR system. The first is a building calibration, and it is done any time the LiDAR system has been moved from one plane to another. New calibration parameters are computed and compared with previous calibration runs. If there is any change, the new values are updated internally or during the LiDAR post-processing. These values are applied to all data collected with this plane/ALS-50 system configuration. Once final processing calibration parameters are established from the building data, a precisely-surveyed surface is observed with the LiDAR system to check for stability in the system. This is done several times during each mission. An average of the systematic biases are applied on a per mission basis."
Process Step:
Process Description: "LIDAR Point Classification: The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helinski, Finland."
Process Step:
Process Description: "Output Files For Product Generation: The product output of LiDAR data is carried out using GeoCue software of Madison, Alabama (LAS Binary and LAS Binary Bare Earth). Intensity images were created using TerraScan software by Terrasolid Limited of Helinski, Finland."
Process Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey
Contact Address:
Address Type: mailing and physical
Address: USGS National Geospatial Program Office
Address: 12201 Sunrise Valley Drive
City: Reston
State or Province: VA
Postal Code: 20192
Country: USA
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Hours: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Contact Instructions: Please visit http://www.usgs.gov/ask/ to contact us.
Process Step:
Process Description: The Lidar data for Denver, Colorado, and surround areas were processed into a NED 1/9th dataset using the ESRI software. The float data (32 tiles) were converted to Arc grids. It was necessary to use Define Projection and Project functions on the original data. The data were then reprojected from Geographic Decimal Seconds NAD83 to Geographic Decimal Degrees NAD83 using ArcTools. The Z unit of data was changed from centimeters to meters (divided by 100) using raster calculator. The shape file generated from the original data extent was edited to eliminate the edge TINing effects. As the final step, DEM and shaded-relief products were generated. Data QC was performed by reviewing the hill shades to detect irregularities in the data. The data were then loaded into ArcSDE to be made available for public access download. Note: There is one NoData stripe around location of -105.186564, and 39.754694 Decimal Degrees. Metadata was created for display through The National Map Seamless Server at http://seamless.usgs.gov, and is available in several formats: HTML, TEXT, XML, FAQ and SGML.
Process Date: 2009
Process Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey
Contact Position: Customer Service Representative
Contact Address:
Address Type: mailing and physical
Address: USGS Earth Resources Observation & 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 Voice Telephone: 1-800-252-4547
Contact TDD/TTY Telephone: 605-594-6933
Contact Facsimile Telephone: 605-594-6589
Contact Electronic Mail Address: custserv@usgs.gov
Hours: 0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)
Spatial Data Organization Information:
Direct Spatial Reference Method: Raster
Raster Object Information:
Raster Object Type: Pixel
Row Count: 15794
Column Count: 27273
Vertical Count: 1
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Latitude Resolution: 0.0000308641975
Longitude Resolution: 0.0000308641975
Geographic Coordinate Units: Decimal degrees
Geodetic Model:
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.2572221
Vertical Coordinate System Definition:
Altitude System Definition:
Altitude Datum Name: North American Vertical Datum of 1988
Altitude Resolution: 0.001
Altitude Units: meters
Altitude Encoding Method: Implicit coordinate
Entity and Attribute Information:
Overview Description:
Entity and Attribute Overview: The attribute summary can be found in the data dictionary.
Entity and Attribute Detail Citation: A link to the NED Data Dictionary describing information that is included in the spatial metadata shapefiles acquired with the DEM is provided at the end of the Metadata Section of this document.
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey
Contact Address:
Address Type: mailing and physical
Address: USGS National Geospatial Program Office
Address: 12201 Sunrise Valley Drive
City: Reston
State or Province: VA
Postal Code: 20192
Country: USA
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Hours: Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA
Contact Instructions: Please visit http://www.usgs.gov/ask/ to contact us.
Resource Description: Downloadable Data
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 either regarding the utility of the data on any system, nor shall the act of distribution constitute any such warranty. The USGS will warranty the delivery of this product in computer-readable format and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer peripherals, or when the physical medium is delivered in damaged condition. Requests for adjustments of credit must be made within 90 days from the date of this shipment from the ordering site.
Standard Order Process:
Digital Form:
Digital Transfer Information:
Format Name: IMG
Transfer Size: 3.813884
Digital Transfer Option:
Online Option:
Computer Contact Information:
Network Address:
Network Resource Name: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/19/IMG/ned19_n40x00_w104x50_co_denvercity_2008.zip
Fees: NONE
Metadata Reference Information:
Metadata Date: 20160401
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: U.S. Geological Survey
Contact Address:
Address Type: mailing and physical
Address: USGS National Geospatial Program Office
Address: 12201 Sunrise Valley Drive
City: Reston
State or Province: VA
Postal Code: 20192
Country: USA
Contact Voice Telephone: 1-888-ASK-USGS (1-888-275-8747)
Hours: Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA
Contact Instructions: Please visit http://www.usgs.gov/ask/ to contact us.
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Extensions:
Online Linkage: http://ned.usgs.gov/NED/metadata.asp
Profile Name: National Elevation Dataset (NED) Metadata
Metadata Extensions:
Online Linkage: http://ned.usgs.gov/source_metadata/Denver_LAS_Bare_Earth_Lot_2.xml
Profile Name: Denver_LAS_Bare_Earth_Lot_2