Biscayne National Park tile extent

Frequently-anticipated questions:

What does this data set describe?

    Title: tile_extent
    Represents the extent of a specific 2x2km tile that has usable Lidar data.

  1. How should this data set be cited?
    U. S. Geological Survey, FISC St. Petersburg, FL, Open-File Report 2006-1118, USGS-NPS-NASA EAARL Submarine Topography-Biscayne National Park.
    The U. S. Geological Survey, in cooperation with the National Park Service (NPS) and the National Aeronautics and Space Administration (NASA), provide the coastal management community with digital elevation products. The U. S. Geological Survey processes aircraft lidar data provided by NASA, develops software tools and algorithms to use and analyze the data, and makes products available to the coastal management community.
  2. What geographic area does the data set cover?

    Biscayne National Park, Homestead, Florida

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

    1. Beginning_Date: 20010710
      Ending_Date: 20010714
      Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: vector digital data

  5. 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 (55604)

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      UTM_Zone_Number: 17
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -81.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000001
      Ordinates (y-coordinates) are specified to the nearest 0.000001
      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.

  6. How does the data set describe geographic features?


    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Feature geometry. (Source: ESRI)

    Coordinates defining the 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?

    The U. S. Geological Survey Center for Coastal and Watershed Studies would like to acknowledge NASA Goddard Space Flight Center for their cooperation and assistance in the development of the data. The National Park Service also contributed by editing the lidar tiles to remove processing artifacts.

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

    Dr. John C. Brock
    Research Oceanographer
    U. S. Geological Survey, FISC St. Petersburg
    600 4th Street South
    St. Petersburg, Florida 33701
    727 803-8747 ext3088 (voice)
    727 803-2031 (FAX)
    Hours_of_Service: Monday-Friday, 8-5, EST

Why was the data set created?

This shapefile was generated as an intermediate step while creating a series of U. S. Geological Survey Lidar maps. Its polygons represent specific regions of a 2x2km tile that have usable Lidar data. All areas not covered by polygons correspond to areas of No Data on the Lidar tile. This shapefile is particularly useful as an analysis mask within Spatial Analyst.

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: December 2005 (process 1 of 3)
    The floating-point Lidar data needs to be converted to an integer raster. This is done with the Int() command within the Raster Calculator.

    Person who carried out this activity:

    National Park Service South Florida / Caribbean Network
    c/o Judd Patterson
    Research Assistant
    18001 Old Cutler Road, Suite 419
    Palmetto Bay, Florida 33157
    United States

    (305) 252-0347 (voice)
    (305) 253-0463 (FAX)

    Date: December 2005 (process 2 of 3)
    The Raster to Feature command is used to convert the data into a vector shapefile.
    Date: December 2005 (process 3 of 3)
    An attribute query is run to locate polygons with a GRIDCODE value of -100. An edit session is started on the shapefile, the queried polygons are removed using the delete key, edits are saved, and the edit session is ended.

How can someone get a copy of the data set?

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


Any use of these data signifies a user's agreement to comprehension and compliance of the U. S. Geological Survey Standard Disclaimer. Ensure all portions of metadata are read and clearly understood before using these data in order to protect both user and USGS interests. See section 6.3 Distribution Liability.


Although the U. S. Geological Survey is making these data sets available to others who may find the data of value, the U. S. Geological Survey does not warrant, endorse, or recommend the use of these data for any given purpose. The user assumes the entire risk related to the use of these data. These data sets are not for navigational purposes. USGS is providing these data "as is", and the U. S. Geological Survey 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 the U. S. Geological Survey be liable to you or to 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.

Acknowledgement of the U. S. Geological Survey Center for Coastal and Watershed Studies as a data source would be appreciated in products developed from these data, and such acknowledgement as is standard for citation and legal practices for data source is expected by users of this data. Sharing new data layers developed directly from these data would also be appreciated by U. S. Geological Survey staff. Users should be aware that comparisons with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in photo interpretation, mapping conventions, and digital processes over time. These data are not legal documents and are not to be used as such.

  1. Who distributes the data set? (Distributor 1 of 1)
    U. S. Geological Survey, FISC St. Petersburg
    600 4th Street South
    St. Petersburg, FL 33701
    727-803-8747 ext3049 (voice)
  2. What's the catalog number I need to order this data set?

    Open-File Report 2006-1118, USGS-NPS-NASA EAARL Submarine Topography-Biscayne National Park

  3. What legal disclaimers am I supposed to read?

    The U. S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics are not legal documents and are not intended to be used as such.

    The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data.

    The U. S. Geological Survey gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from a U. S. Geological Survey server and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on a computer system at the U. S. Geological Survey, no warranty expressed or implied is made regarding the utility of the data on another system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.

  4. How can I download or order the data?

    • Availability in digital form:
    • Media you can order: DVD-ROM

    • Cost to order the data:
    • Special instructions:

      Call U. S. Geological Survey for details

    • Who wrote the metadata?

      Last modified: 20080312

      Metadata author:
      U. S. Geological Survey, FISC St. Petersburg
      600 4th Street South
      St. Petersburg, Florida 33704

      727-803-8747 (voice)

      Contact_Instructions: Call U. S. Geological Survey for Details
      Metadata standard:
      FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

      Metadata extensions used:

      Generated by mp version 2.7.33 on Tue Mar 21 11:09:39 2006