LDEQ Landsat Seven Enhanced Thematic Mapper Pan-Sharpened Mosaic of Louisiana UTM15 NAD83, (2002)

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

    Title:
    LDEQ Landsat Seven Enhanced Thematic Mapper Pan-Sharpened Mosaic of Louisiana UTM15 NAD83, (2002)
    Abstract:
    This data set is a satellite image of the lands and waters of the State of Louisiana. It was created by combining fourteen scenes of 30-meter resolution Landsat Thematic Mapper (TM) imagery with 15-meter resolution panchromatic imagery. The TM and panchromatic imagery for each scene are coincident. The original image data were geo-rectified and resampled using cubic convolution to 25-meter (TM) and 12.5-meter (pan) cells by the Earth Resources Observation Systems (EROS) Data Center. These data were purchased from EROS by the Louisiana Department of Environmental Quality (northern half of state) and the USGS's National Wetlands Research Center Lafayette (southern half of state.) The processing to produce a seamless enhanced image was performed at LDEQ by a LDEQ contractor. The work was funded by a grant from the US EPA to the LDEQ Non-Point Source Water Pollution Section. The image was constructed from a red, green, blue (RGB) composite of bands 7,5 & 3 fused with the panchromatic image to produce the enhanced TM pan sharpened mosaic.
    Supplemental_Information:
    The metadata for this data set include several documents and graphic files. The metadata are incomplete if you did not receive the following files along with the data set: louisiana-tm753-pan-fusion-2002-lut-rescale.htm louisiana-tm753-pan-fusion-2002-lut-rescale_faq.htm louisiana-tm753-pan-fusion-2002-lut-rescale.txt louisiana-tm753-pan-fusion-2002-lut-rescale.sgm louisiana-tm753-pan-fusion-2002-lut-rescale.xml Browse-tm753pan-2002.jpg Browse-tm753pan-2002-detail.jpg.

  1. How should this data set be cited?

    Louisiana Department of Environ, GIS Center contractor DeWitt Braud, 20030214, LDEQ Landsat Seven Enhanced Thematic Mapper Pan-Sharpened Mosaic of Louisiana UTM15 NAD83, (2002): Louisiana Department of Environmental Quality GIS Center, Baton Rouge, LA.

    Online Links:

    • \\Flash\Dewitt\louisiana-tm753-pan-fusion-2002-lut-rescale.img

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -94.054887
    East_Bounding_Coordinate: -88.619021
    North_Bounding_Coordinate: 33.023534
    South_Bounding_Coordinate: 28.835862

  3. What does it look like?

    Browse-tm753pan-2002.jpg (JPEG)
    A reduced scale view of the entire area of the data set.
    Browse-tm753pan-2002-detail.jpg (JPEG)
    Optimal viewing resolution (no pixelating) of Avery Island salt dome.

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

    Beginning_Date: 03-Jan-2002
    Beginning_Time: Varies by scene.
    Ending_Date: 27-Feb-2002
    Ending_Time: varies by scene
    Currentness_Reference: Range of dates of imagery.

  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 36548 x 40655 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: 15
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -93.000000
      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 12.500000
      Ordinates (y-coordinates) are specified to the nearest 12.500000
      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?

    Layer_1

    ObjectID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Value

    Count

    Layer_2

    ObjectID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Value

    Count

    Layer_3

    ObjectID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Value

    Count


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?

    University of Louisiana at Lafayette NASA Regional Applications Center's America View Program facilitated the acquisition of the Landsat scenes.

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

    Joe Holmes
    LDEQ GIS Center
    IT Geographic Manager
    7290 Bluebonnet Rd.
    Baton Rouge, LA 70810
    USA

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M - F


Why was the data set created?

The merged satellite image was produced to support on-going research for the LDEQ Non-point Source Program by providing a more current view of land cover/land use within Louisiana and to support NWRC's work in evaluating Louisiana's coastal wetlands.


How was the data set created?

  1. From what previous works were the data drawn?

    (source 1 of 2)
    Center, EROS Data , Unknown, Landsat 7 Thematic Mapper multispectral 25-meter imagery.

    Other_Citation_Details:
    Worldwide Reference System (WRS): Path21/Row39, Acquired 20020103; Path21/Row40, Acquired 20020103; Path22/Row38, Acquired 20020227; Path22/Row39, Acquired 20020227; Path22/Row40, Acquired 20020227; Path23/Row37, Acquired 20020202; Path23/Row38, Acquired 20020202; Path23/Row39, Acquired 20020202; Path23/Row40, Acquired 20020202; Path24/Row37, Acquired 20020108; Path24/Row38, Acquired 20020108; Path24/Row39, Acquired 20020108; Path25/Row37, Acquired 20020115; Path25/Row38, Acquired 20020115.
    Type_of_Source_Media: CD-ROM

    (source 2 of 2)
    Center, EROS Data , Unknown, Landsat 7 Thematic Mapper panchromatic 12.5 meter imagery.

    Other_Citation_Details:
    Worldwide Reference System (WRS): Path21/Row39, Acquired 20020103; Path21/Row40, Acquired 20020103; Path22/Row38, Acquired 20020227; Path22/Row39, Acquired 20020227; Path22/Row40, Acquired 20020227; Path23/Row37, Acquired 20020202; Path23/Row38, Acquired 20020202; Path23/Row39, Acquired 20020202; Path23/Row40, Acquired 20020202; Path24/Row37, Acquired 20020108; Path24/Row38, Acquired 20020108; Path24/Row39, Acquired 20020108; Path25/Row37, Acquired 20020115; Path25/Row38, Acquired 20020115.

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

    Date: Unknown (process 1 of 8)
    Original data were geo-rectified and resampled to 25-meter and 12.5-meter cells by EROS Data Center using cubic convolution.

    Date: Jun-2002 (process 2 of 8)
    Data were imported from FSTL7 formatted TM 2002 data from source CD's into an ERDAS Imagine format. The multi-spectral and pan data were reprojected to the NAD83 UTM Zones 15 and 16, depending on scene center location. The data were burned to CD and transferred to LDEQ

    Person who carried out this activity:

    John Barras
    USGS National Wetlands Research Center
    Supervisory Geographer

    225-578-7486 (voice)
    john_barras@usgs.gov

    Hours_of_Service: 8:00 - 5:00 M - F
    Date: Unknown (process 3 of 8)
    The scenes in UTM Zone 16 were reprojected to UTM Zone 15 NAD83, and resampled using nearest neighbor to 25 meter pixels for the multispectral and 12.5 meter pixels for the panchromatic.

    Person who carried out this activity:

    DeWitt Braud
    LDEQ
    Contractor

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M - F
    Contact_Instructions: Messages can be left at the listed number for Mr. Braud.
    Date: Unknown (process 4 of 8)
    Each multispectral scene was subset to bands 3, 5, 7 and arranged in RGB-753 order. Each multispectral and panchromatic scene was converted to reflectance using header information. The reflectance scenes were matched and mosaiced in path order. Mosaics attempted to exclude bad data areas and clouds when possible. Multispectral and panchromatic imagery were separately mosaiced.

    Person who carried out this activity:

    DeWitt Braud
    LDEQ
    Contractor

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M-F
    Contact_Instructions: Messages can be left at the listed number for Mr. Braud.
    Date: Unknown (process 5 of 8)
    The reflectance mosaics were converted back to 8-bit range using a linear rescaling function. The TM mosaic was cut to state boundary.

    Person who carried out this activity:

    DeWitt Braud
    LDEQ
    Contractor

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M-F
    Contact_Instructions: Messages can be left at number for Mr. Braud.
    Date: Unknown (process 6 of 8)
    A local histogram filter was applied to the panchromatic mosaic, which was then cut to the state bouondary.

    Person who carried out this activity:

    DeWitt Braud
    LDEQ
    Contractor

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M-F
    Contact_Instructions: Messages can be left at number for Mr. Braud.
    Date: Unknown (process 7 of 8)
    The two mosaics were fused using a modified band-weighted ratio product of the panchromatic image.

    Person who carried out this activity:

    DeWitt Braud
    LDEQ
    Contractor

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M-F
    Contact_Instructions: Messages can be left at number for Mr. Braud.
    Date: Unknown (process 8 of 8)
    The data set was rescaled to full 8-bit range clipped to maximum pixel value of 254.

    Person who carried out this activity:

    DeWitt Braud
    LDEQ
    Contractor

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M-F
    Contact_Instructions: Messages can be left at number for Mr. Braud.


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

  1. How well have the observations been checked?

    Not applicable as this raster data set is unclassified. Values appearing as attributes vary depending on applied contrast stretch.

  2. How accurate are the geographic locations?

    RMS = 1 pixel which is equivalent to 25 meters.

  3. How accurate are the heights or depths?

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

    The entire state of Louisiana out to the State-Federal water boundary is included.

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

    The imagery exhibits good spatial correspondence to USGS orthophoto imagery in the same coordinate system.


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:
These unaltered data should not be redistribute without all of the elements of the metadata listed in the Supplemental_Information section of this metadata document. It is recommended that third parties wishing to use these data obtain them from the Distributor listed in this metadata document. If these data are altered or incorporated into another dataset, they are not to be redistributed without also: altering the name of the dataset, including a Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998) compliant metadata file that describes the dataset and reflects the alteration steps that makes the new dataset different from this one, and citing this metadata as a source for the altered dataset using the source citation specified below. If these digital data are used in the production of a report or in compilation of a stand-alone printed map, then this dataset is to be cited in the report or on the map using the source citation specified below. The following source citation is to be used when citing this dataset: "LDEQ Landsat Enhanced Thematic Mapper Pan-Sharpened Mosaic of Louisiana UTM15 NAD83, (2002)."

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

    Joe Holmes
    LDEQ GIS Center
    IT Geographic Manager

    225-765-0884 (voice)
    225-765-2771 (FAX)
    joe_h@ldeq.org

    Hours_of_Service: 8:00 - 5:00 M-F
  2. What's the catalog number I need to order this data set?

    "LDEQ Landsat Seven Enhanced Thematic Mapper Pan-Sharpened Mosaic of Louisiana UTM15 NAD83, (2002)" is the ERDAS Imagine (.img) version of the data.

  3. What legal disclaimers am I supposed to read?

    The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the Louisiana Department of Environmental Quality (LDEQ) be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The LDEQ does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form.These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures. Although these data have been processed successfully on computers at the LDEQ GIS Center no guarantee, expressed or implied, is made by LDEQ regarding the use of these data on any other system, nor does the act of distribution constitute or imply any such warranty. Distribution of these data is intended for information purposes and should not be considered authoritative for navigational, engineering, legal and other site-specific uses.

  4. How can I download or order the data?

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

    The ERDAS Imagine 8.5 (.img) version of the data will only be distributable with consultation between the requestor and the GIS Center. Special arrangements will need to be decided on a case by case basis. This is a result of the large file size which precludes the usual distribution media.


Who wrote the metadata?

Dates:
Last modified: 27-Feb-2003
To be reviewed: Jul-2003

Metadata author:
Joe Holmes
LDEQ GIS Center
IT Geographic Manager
7290 Bluebonnet Rd.
Baton Rouge, LA 70810

225-765-0884 (voice)
225-765-2771 (FAX)
joe_h@ldeq.org

Hours_of_Service: 8:00 - 5:00 M-F
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:


Generated by mp version 2.7.3 on Thu Feb 27 15:30:45 2003