Land and Water Interface of Louisiana from 2002 Landsat Thematic Mapper Satellite Imagery, Geographic NAD83, LOSCO (2005) [landwater_interface_la_03ac_LOSCO_2002]

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Frequently-anticipated questions:

What does this data set describe?

Title:
Land and Water Interface of Louisiana from 2002 Landsat Thematic Mapper Satellite Imagery, Geographic NAD83, LOSCO (2005) [landwater_interface_la_03ac_LOSCO_2002]
Abstract:
These are polygon and raster data sets derived from 2002 Landsat Thematic Mapper Satellite Imagery that indicates areas of land and areas of water in Louisiana. The interface is for the entire state within a 10 mile buffer. There are 4 layers: a 3 acre filter layer, a 5 acre filter layer, a 25 acre filter layer, and a 1 acre filter raster layer.
Supplemental_Information:
A filtering threshold of 3-acres was used to create this land-water interface. Land and water polygons smaller than 3-acres are not visible in this data layer.
  1. How should this data set be cited?

    Louisiana Oil Spill Coordinator's Office (LOSCO), 2004, Land and Water Interface of Louisiana from 2002 Landsat Thematic Mapper Satellite Imagery, Geographic NAD83, LOSCO (2005) [landwater_interface_la_03ac_LOSCO_2002]:, Louisiana Oil Spill Coordinator's Office (LOSCO), Baton Rouge, LA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -94.215352
    East_Bounding_Coordinate: -88.591700
    North_Bounding_Coordinate: 33.164892
    South_Bounding_Coordinate: 28.708745

  3. What does it look like?

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

    Beginning_Date: 02-Jan-2002
    Ending_Date: 27-Feb-2002
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: vector digital data

  6. How does the data set represent geographic features?

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

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (29773)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.

      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?

    landwater_interface_la_03ac_LOSCO_2002

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    CLASS
    Class of feature (Source: LSU)

    ValueDefinition
    Water 
    Land 

    PERIMETER
    Perimeter of polygon in feet (Source: LSU)

    GRID_CODE
    Feature code (Source: LSU)

    ValueDefinition
    1Water
    2Land

    Shape_Area
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.

    AREA
    Area in acres (Source: LSU)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape_Leng

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?

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

    Louisiana Oil Spill Coordinator's Office (LOSCO)
    c/o David Gisclair
    Technical Assistance Program (TAP) Director
    Louisiana Oil Spill Coordinator's Office
    Baton Rouge, Louisiana 70804
    USA

    (225) 219-5800 (voice)
    (225) 219-5800 (FAX)
    dgisclair@losco.state.la.us

Why was the data set created?

This dataset was created in order to define the shoreline and to provide a classified feature use in GIS systems and modeling. This data is not to be used for legal, property description, navigation, or other site specific applications.

How was the data set created?

  1. From what previous works were the data drawn?

    LandsatTM (source 1 of 1)
    Louisiana Department of Environ, GIS Center, Unknown, Landsat 7 Thematic Mapper Multispectral 25 Meter Imagery: EROS Data Center.

    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_Contribution: Satellite imagery

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

    (process 1 of 1)
    The steps taken to create the 3 acre filter, 5 acre filter, and 25 acre filter layers are as follows: 1. Subset scenes to bands 3, 4, 5.2. 2. Mosaic scenes in same path. 3. Classify land and water. 4. Create land/water mask. 5. Mosaic land/water mask paths. 6. Create 10 mile buffer from state boundary. 7. Cut land/water mask mosaic using buffer. 8. Eliminate land and water areas less than 1 acre, 3 acres, 5 acres, and 25 acres, creating 4 filtered land/water mask files. 9. Convert raster masks to polygon vectors. 10. Smooth the vectors. 11. Create shapefiles. 12. Add land/water class column based on grid code. 13. Reproject to Geographic NAD83 Datum

    The steps taken to create the 1acre filter raster layer is as follows: 1. Subset scenes to bands 3, 4, 5.2. 2. Mosaic scenes in same path. 3. Classify land and water. 4. Create land/water mask. 5. Mosaic land/water mask paths. 6. Create 10 mile buffer from state boundary. 7. Cut land/water mask mosaic using buffer. 8. Eliminate land and water areas less than 1 acre, 3 acres, 5 acres, and 25 acres, creating 4 filtered land/water mask files.

    Person who carried out this activity:

    DeWitt Braud
    Louisiana State University
    Louisiana State University
    Baton Rouge, LA 70803
    USA

    225.578.6177 (voice)
    dbrau1@lsu.edu

    Hours_of_Service: 0800-1630 CST
    Data sources used in this process:
    • LandsatTM

  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?

  3. How accurate are the heights or depths?

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

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

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:
This data is not to be for legal, property description, navigation, or other site specific applications

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 dataset in the 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 the compilation of a standalone 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: 'Land and Water Interface of Louisiana from 2002 Landsat Thematic Mapper Satellite Imagery, Geographic NAD83, LOSCO (2005) [la_landwater_3ac]'

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

    Louisiana Oil Spill Coordinator's Office
    c/o David Gisclair
    Technical Assistance Program (TAP) Director
    Louisiana Oil Spill Coordinator's Office
    Baton Rouge, Louisiana 70804
    USA

    (225) 219-5800 (voice)
    (225) 219-5802 (FAX)
    dgisclair@losco.state.la.us

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

    landwater_interface_la_03ac_LOSCO_2002

  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 Oil Spill Coordinator's Office (LOSCO) 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 LOSCO 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 LOSCO, no guarantee, expressed or implied, is made by LOSCO 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?

Who wrote the metadata?

Dates:
Last modified: 08-Jul-2008
Metadata author:
Louisiana State University, Center for GeoInformatics
c/o Dina Knight
Geospatial Scientist/Research Associate 4
Louisiana State University
Baton Rouge, LA 70803
USA

dknight@lsu.edu

Hours_of_Service: 0800-1630 CST
Contact_Instructions: Electronic mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.14 on Fri Jul 18 16:22:22 2008