Landsat 7 ETM/1G satellite imagery - Hawaiian Islands cloud-free mosaics

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Frequently anticipated questions:


What does this data set describe?

Title:
Landsat 7 ETM/1G satellite imagery - Hawaiian Islands cloud-free mosaics
Abstract:
Cloud-free Landsat satellite imagery mosaics of the islands of the main 8 Hawaiian Islands (Hawaii, Maui, Kahoolawe, Lanai, Molokai, Oahu, Kauai and Niihau). Landsat 7 ETM (enhanced thematic mapper) is a polar orbiting 8 band multispectral satellite-borne sensor. The ETM+ instrument provides image data from eight spectral bands. The spatial resolution is 30 meters for the visible and near-infrared (bands 1-5 and 7). Resolution for the panchromatic (band 8) is 15 meters, and the thermal infrared (band 6) is 60 meters. The approximate scene size is 170 x 183 kilometers (106 x 115 miles). A Nadir-looking system, the sensor has provided continuous coverage since July 1999, with a 16-day repeat cycle.The Level 1G product is radiometrically and geometrically corrected (systematic) to the user-specified parameters including output map projection, image orientation, pixel grid-cell size, and resampling kernel. The correction algorithms model the spacecraft and sensor using data generated by onboard computers during imaging. Sensor, focal plane, and detector alignment information provided by the Image Assessment System (IAS) in the Calibration Parameter File (CPF) is also used to improve the overall geometric fidelity. The resulting product is free from distortions related to the sensor (e.g., jitter, view angle effect), satellite (e.g., attitude deviations from nominal), and Earth (e.g., rotation, curvature). Residual error in the systematic L1G product is less than 250 meters (1 sigma) in flat areas at sea level. The systematic L1G correction process does not employ ground control or relief models to attain absolute geodetic accuracy.
Supplemental_Information:
Sensor Type - Multispectral Sensor Name - Landsat 7 Sensor Homepage URL - <http://landsat7.usgs.gov> Sensor Platform - Satellite Sensor Orbit Type - Near-polar, Sun-synchronous, Near-circular Sensor Revisit Frequency - 16 days Sensor Launch Date - 19990415 Nominal Azimuth Nominal Elevation Nominal Altitude - 705 kilometers Incidence Angle (look) - 98.2 degrees Sun Angle Azimuth Sun Angle Elevation Orbit Direction Mode Name - Normal, Thermal, Panchromatic Mode Description - Normal (Data for bands 1-4 are collected at the prime focal plane and are transmitted to ground on data channel 1. Data for bands 5 and 7 are collected at the cold focal plane and are transmitted to ground on data channel 1 and data channel 2.), Thermal (Data for band 6 are collected at the cold focal plane and are transmitted to ground on data channel 1.), Panchromatic (Panchromatic data are collected on the prime focal plane and are transmitted to ground on data channel 2.) Mode Resolution - Normal (30), Thermal (60), Panchromatic (15) Mode Resolution Units - Meters Mode Resolution Notes Swath Width - 183 Swath Width Units - Kilometers Swath Width Notes Stereo Stereo Pair GUID Day or Night Overlap Path Num Row Num Weather Conditions Flight Line ID Flight Frame ID Film Roll ID Original Frame Size Scan DPI Beam Position Name Beam Incidence Angle Nominal Beam Incidence Angle Low Beam Incidence Angle High Band ID - 1-8 Band Name - 1 (Blue), 2 (Red), 3 (Green), 4 (NIR), 5 (SWIR), 6 (Thermal SWIR), 7 (SWIR), 8 (Panchromatic) Band Wavelength Low - 1 (.450), 2 (.525), 3 (.630), 4 (.775), 5 (1.550), 6 (10.400), 7 (2.090), 8 (.520) Band Wavelength High - 1 (.515), 2 (.605), 3 (.690), 4 (.900), 5 (1.750), 6 (12.500), 7 (2.350), 8 (.900) Band Wavelength Units - micrometers Band Frequency Band Frequency Units Band
  1. How should this data set be cited?

    Source Imagery: U.S. Geological Survey, EROS Data Center, and Processor: Raytheon Corporation, Hawaii Synergy Project, 20020131, Landsat 7 ETM/1G satellite imagery - Hawaiian Islands cloud-free mosaics.

    Online Links:

    Other_Citation_Details: Brokered 1 of 5

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -160.247
    East_Bounding_Coordinate: -154.807
    North_Bounding_Coordinate: 22.228
    South_Bounding_Coordinate: 18.841199

  3. What does it look like?

    <http://www.hawaii.gov/dbedt/gis/maps/landsat.jpg> (JPEG)
    Image of Landsat scene.

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 12-Jul-1999
    Ending_Date: 21-Aug-2000
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: remote-sensing image

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Raster data set. It contains the following raster data types:

      • Dimensions 5343 x 4697 x 1, type Pixel

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 4
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -159.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using Row and Column
      Abscissae (x-coordinates) are specified to the nearest 30.000000
      Ordinates (y-coordinates) are specified to the nearest 30.000000
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  7. How does the data set describe geographic features?


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Cloud-free Landsat mosaics prepared by the Hawaii Synergy Project under funding from NASA via the Raytheon Corporation.

  3. To whom should users address questions about the data?

    Pacific Disaster Center
    Attn: Director, Data & Information Resources Division
    Publisher
    590 Lipoa Parkway, Suite 259
    Kihei, HI 96753
    United States

    808-891-0525 (voice)
    808-891-0526 (FAX)
    data@pdc.org


Why was the data set created?

The Landsat Project is a joint initiative of the U.S Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA) to gather Earth resource data using a series of satellites. NASA was responsible for developing and launching the spacecrafts, while the USGS is responsible for flight operations, maintenance, and management of all ground data reception, processing, archiving, product generation, and distribution. The primary objective of the Landsat Project is to ensure a collection of consistently calibrated Earth imagery. Landsat's Global Survey Mission is to establish and execute a data acquisition strategy that ensures repetitive acquisition of observations over the Earths land mass, coastal boundaries, and coral reefs; and to ensure the data acquired are of maximum utility in supporting the scientific objectives of monitoring changes in the Earths land surface and associated environment.


How was the data set created?

  1. From what previous works were the data drawn?

    Landsat ETM (source 1 of 1)
    Source Imagery: U.S. Geological Survey, EROS Data Center, and Processor: Raytheon Corporation, Hawaii Synergy Project, 2003, Landsat ETM+ Orthorectified Imagery.

    Online Links:

    Other_Citation_Details:
    Customer Services, U.S. Geological Survey, EROS Data Center, 47914 252nd Street, Sioux Falls, South Dakota, United States, 57198, custserv@usgs.gov, 605-252-4547, 605-594-6589 (fax)
    Type_of_Source_Media: Landsat ETM+ Orthorectified Imagery
    Source_Contribution: Used to create mosaics

  2. How were the data generated, processed, and modified?

    Date: Unknown (process 1 of 1)
    Vendor Product Name - Enhanced Thematic Mapper Plus (ETM+) Vendor Product Description - The ETM+ instrument provides image data from eight spectral bands (band designations). The spatial resolution is 30 meters for the visible and near-infrared (bands 1-5 and 7). Resolution for the panchromatic (band 8) is 15 meters, and the thermal infrared (band 6) is 60 meters. The approximate scene size is 170 x 183 kilometers (106 x 115 miles). Processing Level Name - 1G Processing Level Description - Systematic Correction (Level 1G) includes both radiometric and geometric correction. Image data is provided in rescaled 8-bit (DN) values. The scene will be rotated, aligned, and georeferenced to a user-defined map projection. Geometric accuracy of the systematically corrected product should be within 250 meters (1 sigma) for low-relief areas at sea level. Hawaii Synergy Project Processing: Cloud-free Landsat mosaics were prepared under funding from NASA via the Raytheon Corporation. Kauai - Niihau Path: 65 Row: 45 Dates: 19990811, 19991115, 20000102, 20000626 Path: 66 Row: 45 Dates: 19990802, 20000109, 20000617, 20000921 Oahu Path: 64 Row: 45 Dates: 20000212, 20000603 Path: 65 Row: 45 Dates: 20000219 Molokai - Lanai Path: 64 Row: 45 Dates: 20000212, 20000603 Path: 64 Row: 46 Dates: 20000127 Maui - Kahoolawe, Hawaii (Big Island) Path: 63 Row: 46 Dates:19990712, 19990728, 19990813, 19990829, 19990914, 19990930, 19991016, 19991101, 19991203, 19991219, 20000104, 20000120, 20000205, 20000221 Hawaii (Big Island) Path: 62 Row: 47 Dates: 19990721, 19990806, 20000214 Path 63 Row: 47 Dates: 19990728, 19990829, 20000221 Path: 65 Row: 46 Dates: 19990822, 19991009 PDC Processing - The PDC received jpeg images from the Hawaii Synergy Project in July 2003. ENVI software was used to convert the jpeg images to GeoTiff format.

    Note: Cloud Cover - None affecting land area

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    None

  2. How accurate are the geographic locations?

    The nominal resolution is achieved within 30 degrees of nadir. Geodetic accuracy is monitored using calibration scenes containing ground control points. Scenes are first radiometrically and geometrically corrected. Control point locations are then measured on the processed imagery and compared to known ground locations. Any terrain effects are removed analytically in the comparison. The post-calibration geodetic accuracy of systematic ETM+ products is approximately 50 meters which is much better than 250 meter specification placed on the system. Band-to-band registration measures the relative alignment of the eight ETM+ spectral bands after processing to Level 1Gs. Measured registration between the primary and cold focal planes in the line direction is typically 0.08-0.10 pixels, well below the design specification limit of 0.17 pixels. Image registration accuracy is measured using cloud-free images of two separate calibration sites. One meter resolution DOQs were mosaicked and reduced to 15 meter resolution. The image registration assessment was performed in two ways. First, the ETM+ images were compared against the DOQ reference images. This provides a measure of image distortion relative to an absolute reference. The 1 sigma accuracy for registration to DOQs is 4.3 meters along scan and 4.2 meters across scan. Second, two ETM+ scenes were cross correlated. This provides a measure of image distortion that changes scene-to-scene although systematic calibration distortions may cancel out. The 1 sigma accuracy for ETM+ to ETM+ registration is 3.2 meters along scan and 1.9 meters across scan.

  3. How accurate are the heights or depths?

    None

  4. Where are the gaps in the data? What is missing?

    None

  5. How consistent are the relationships among the observations, including topology?

    None


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints: None

  1. Who distributes the data set? (Distributor 1 of 2)

    National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS), center for Coastal Monitoring and Assessment (CCMA), Biogeography Branch
    Biogeography Branch Leader, Mapping Manager
    1305 East West Highway, N/SCI1
    Silver Spring, MD 20910

    301-713-3028 (voice)
    301-713-4384 (FAX)
    tim.battista@noaa.gov

    Hours_of_Service: 0800 - 1700, Monday to Friday, EST
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    Contact Distributor


  1. Who distributes the data set? (Distributor 2 of 2)

    Pacific Disaster Center
    Attn: Director Data and Information Resources Division
    Publisher
    590 Lipoa Parkway, Suite 259
    Kihei, HI 96753
    United States

    808-891-0525 (voice)
    808-891-0526 (FAX)
    data@pdc.org

  2. What's the catalog number I need to order this data set?

    Offline Data

  3. What legal disclaimers am I supposed to read?

    None

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 05-Sep-2014
Last Reviewed: 24-Nov-2008
Metadata author:
Pacific Disaster Center
Attn: Director Data and Information Resources Division
Publisher
590 Lipoa Parkway, Suite 259
Kihei, HI 96753
United States

808-891-0525 (voice)
808-891-0526 (FAX)
data@pdc.org

Metadata standard:
Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.13 on Fri Nov 28 10:43:36 2014