2011 NOAA Ortho-rectified Mosaic of Brownsville Ship Channel, Texas (NODC Accession 0105604)

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Frequently anticipated questions:


What does this data set describe?

Title:
2011 NOAA Ortho-rectified Mosaic of Brownsville Ship Channel, Texas (NODC Accession 0105604)
Abstract:
This data set contains ortho-rectified mosaic tiles, created as a product from the NOAA Integrated Ocean and Coastal Mapping (IOCM) initiative. The source imagery was acquired from 20110302 - 20110302. The images were acquired with an Applanix Digital Sensor System (DSS). The original images were acquired at a higher resolution than the final ortho-rectified mosaic.
Supplemental_Information: The ground sample distance (GSD) for each pixel is 0.50 m.
  1. How should this data set be cited?

    Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division, 20110630, 2011 NOAA Ortho-rectified Mosaic of Brownsville Ship Channel, Texas (NODC Accession 0105604): NOAA's Ocean Service, National Geodetic Survey (NGS), Silver Spring, MD.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -97.4357997316
    East_Bounding_Coordinate: -97.1196756391
    North_Bounding_Coordinate: 26.1320951965
    South_Bounding_Coordinate: 25.9104268624

  3. What does it look like?

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

    Beginning_Date: 02-Mar-2011
    Ending_Date: 02-Mar-2011
    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.

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 14
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -99.00000000
      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 0.50000000
      Ordinates (y-coordinates) are specified to the nearest 0.50000000
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum 1983.
      The ellipsoid used is GRS80.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257222101.

  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?

    This data set was developed by NOAA.

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

    National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
    Chief, Remote Sensing Division
    1315 East West Highway, N/NGS3
    Silver Spring, MD 20910
    USA

    301-713-2663 (voice)


Why was the data set created?

Ortho-rectified mosaic tiles are an ancillary product of NOAA's Coastal Mapping Program (CMP), created through a wider Integrated Ocean and Coastal Mapping initiative to increase support for multiple uses of the data.


How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 26-May-2011 (process 1 of 1)
    Mosaic's were generated from the color ortho-rectified imagery using OrthoVista. Pyramids are built in during this step. Mosaic data have not been histogram stretched and only minimal color balancing has been performed. The images are in 8 bit RGB or IR. The DEM source is 30 meter posting USGS NED. Cubic convolution resampling method was used to create the final ortho-rectified mosaic. Original image tiles are 2.5 km by 2.5 km squares.

  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?

  2. How accurate are the geographic locations?

    The horizontal positional accuracy and the assurance of that accuracy are dependent upon the accuracy of the data inputs to the rectification process. These data inputs include the digital elevation model (DEM), accuracy of control, and methodology used to georeference the imagery that meet NOAA's Coastal Mapping Program standards.

  3. How accurate are the heights or depths?

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

    The extent of image coverage is limited to the acquired flight lines which were planned to map the shoreline and therefore may not include all areas within the bounding coordinates.

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

    All rectified images were loaded in Global Mapper to view the entire project area for tone differences, complete coverage, warping/smearing imagery due to inaccurate DEM, and any other obvious problems. All final tiles are reviewed for artifacts, unblended seam-lines and warps or smears and then corrected using Photoshop.


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:
Data set is not for use in litigation. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, NOAA, cannot assume liability for any damages, or misrepresentations, caused by any inaccuracies in the data, or as a result of the data to be used on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. We do request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these photos in a report, publication, or presentation.

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

    NOAA Coastal Services Center
    Attn: Clearinghouse Manager
    Clearinghouse Manager
    2234 South Hobson Avenue
    Charleston, SC 29405-2413
    USA

    (843)740-1210 (voice)
    (843)740-1224 (FAX)
    clearinghouse@noaa.gov

    Hours_of_Service: Monday to Friday, 8 a.m. to 5 p.m., Eastern Standard Time
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    Users must assume responsibility to determine the usability of these data. These photographs were obtained for use by NGS during the course of its development of potential final products to fulfill its statutory mission. Although NGS is making these photographs available to others who may find the photographs of value, NGS does not warrant, endorse, or recommend the use of these photographs for any given purpose. NGS is providing these photographs "as is," and NGS disclaims any and all warranties, whether expressed or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. In no event will NGS be liable to you or any third party for any direct, indirect, incidental, consequential, special, or exemplary damages or lost profits resulting from any use or misuse of these data.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 05-Sep-2013
Metadata author:
National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), National Geodetic Survey (NGS), Remote Sensing Division
Attn: Chief, Remote Sensing Division
Chief, Remote Sensing Division
1315 East West Highway, N/NGS3
Silver Spring, MD 20910
USA

301-713-2663 (voice)
Mike.Aslasken@noaa.gov

Hours_of_Service: Monday to Friday, 8 a.m. to 5 p.m., Eastern Standard Time.
Metadata standard:
FGDC CSDGM (FGDC-STD-001-1998)


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