Navassa_1D_metadata: Fractal analysis of the Navassa Island seascape

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Frequently anticipated questions:

What does this data set describe?

Title:
Navassa_1D_metadata: Fractal analysis of the Navassa Island seascape
Abstract:
This release provides the numerical results of the fractal analyses discussed in Zawada and others (2010; https://doi.org/10.1029/2010GL043789) for the Navassa Island reefscape.
Supplemental_Information:
Navassa Island reefscape is located approximately 50 km west of the southwestern tip of Haiti. In 2006, the National Oceanic and Atmospheric Administration (NOAA) Center for Coastal Fisheries and Habitat Research conducted the first high-resolution, multibeam bathymetric survey around Navassa Island. A 1-meter spatial resolution digital elevation model (DEM) produced by NOAA served as the dataset. Fractal analysis of transects extracted from the DEM provides a rapid assessment of the variability in roughness and, by inference, topographic complexity over the entire Navassa Island benthic seascape.
  1. How might this data set be cited?
    Zawada, David G., 2011, Navassa_1D_metadata: Fractal analysis of the Navassa Island seascape:.

    This is part of the following larger work.

    Zawada, David G., 2011, Fractal Analysis of the Navassa Island Seascape: U.S. Geological Survey data series doi:10.3133/ds592, U.S. Geological Survey, Reston, Virginia.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: 75.039028
    East_Bounding_Coordinate: 74.992867
    North_Bounding_Coordinate: 18.421583
    South_Bounding_Coordinate: 18.382081
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2006
    Currentness_Reference:
    No future revsions are planned.
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: raster digital data
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    1D_variation_results.nc
    None (Source: None)
    eps
    The series of observation scales used to determine the average variations in elevation extremes. (Source: Dubuc, B., Quiniou, J.F., Roques-Carmes, C., Tricot, C., and Zucker, S.W., 1989a, Evaluating the fractal dimension of profiles: Physical Review A, v. 39, no. 3, p. 1500-1512.)
    Range of values
    Minimum:1
    Maximum:100
    Units:Meters
    rows
    Labels for the rows of the grid used to subdivide the study site. (Source: Zawada, D.G., Piniak, G.A., and Hearn, C.J., 2010, Topographic complexity and roughness of a tropical benthic seascape: Geophysical Research Letters, v. 37, 6 p., accessed October 14, 2010, at https://doi.org/10.1029/2010GL043789.)
    Range of values
    Minimum:1
    Maximum:12
    columns
    Labels for the columns of the grid used to subdivide the study site. (Source: Zawada, D.G., Piniak, G.A., and Hearn, C.J., 2010, Topographic complexity and roughness of a tropical benthic seascape: Geophysical Research Letters, v. 37, 6 p., accessed October 14, 2010, at https://doi.org/10.1029/2010GL043789.)
    Range of values
    Minimum:A
    Maximum:I
    angles
    Angular orientation of the transects extracted from a given grid cell. (Source: Zawada, D.G., Piniak, G.A., and Hearn, C.J., 2010, Topographic complexity and roughness of a tropical benthic seascape: Geophysical Research Letters, v. 37, 6 p., accessed October 14, 2010, at https://doi.org/10.1029/2010GL043789.)
    Range of values
    Minimum:0
    Maximum:345
    Units:Degrees
    avg_variations
    Average variations in elevation extremes as a function of the observation scale, eps. (Source: Dubuc, B., Quiniou, J.F., Roques-Carmes, C., Tricot, C., and Zucker, S.W., 1989a, Evaluating the fractal dimension of profiles: Physical Review A, v. 39, no. 3, p. 1500-1512.)
    Range of values
    Minimum:0.047
    Maximum:25.44
    Units:Meters
    fractal_dims
    Fractal dimension estimates for the transects in each grid cell. (Source: Zawada, D.G., Piniak, G.A., and Hearn, C.J., 2010, Topographic complexity and roughness of a tropical benthic seascape: Geophysical Research Letters, v. 37, 6 p., accessed October 14, 2010, at https://doi.org/10.1029/2010GL043789.)
    Range of values
    Minimum:1.0
    Maximum:1.7
    Entity_and_Attribute_Overview:
    Fractal computations were performed by the USGS along transects extracted from the Navassa Island digital elevation model (DEM) using the Variation Method of Dubuc and others. (1989). Algorithm implementation details are presented in Zawada and Brock (2009) and Zawada and others. (2010). Transect analyses involved dividing the DEM into a set of non-overlapping tiles that were 440 x 440 m in size, which created a matrix with 12 rows and 9 columns. For each tile, a series of transects was extracted in a radial pattern emanating from the center in 15° increments. Results from the Variation Method and the corresponding fractal dimension for each transect are available in the netCDF file 1D_variation_results.nc.
    Entity_and_Attribute_Detail_Citation:
    Dubuc, B., Quiniou, J.F., Roques-Carmes, C., Tricot, C., and Zucker, S.W., 1989a, Evaluating the fractal dimension of profiles: Physical Review A, v. 39, no. 3, p. 1500-1512. Zawada, D.G., and Brock, J.C., 2009, A multiscale analysis of coral reef topographic complexity using Lidar-derived bathymetry: Journal of Coastal Research, SI (53), p. 6-15. (Also available at https://doi.org/10.2112/SI53-002.1)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • David G. Zawada
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?

Why was the data set created?

This release provides the numerical results of the fractal analyses discussed in Zawada and others (2010; https://doi.org/10.1029/2010GL043789) for the Navassa Island reefscape. The project represents the continuation of a U.S. Geological Survey (USGS) research effort begun in 2006 (Zawada and others, 2006) to understand the patterns and scalability of roughness and topographic complexity from individual corals to complete reefscapes.

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: 14-Aug-2024 (process 1 of 1)
    This metadata record was modified from its original release in Data Series 592, so that it could be added to the center's metadata repository on the Coastal and Marine Geoscience Data System (CMGDS, https://cmgds.marine.usgs.gov/metadata/spcmsc/) for ingestion in downstream metadata cataloguing services. A metadata persistent identifier (PID) was also added to the Keywords section of this record to follow USGS Fundamental Science Practices (FSP). Person who carried out this activity:
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Attn: USGS SPCMSC Data Management
    600 4th Street South
    Saint Petersburg, FL

    727-502-8000 (voice)
    gs-g-spcmsc_data_inquiries@usgs.gov
  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?
    No formal attribute accuracy tests were conducted.
  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?
    Dataset is considered complete for the information presented, as described in the abstract.
  5. How consistent are the relationships among the observations, including topology?
    No formal logical accuracy tests were conducted.

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 The U.S. Geological Survey must be acknowledged as originator of these results in future products or derivative research.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
    Attn: USGS SPCMSC Data Management
    600 4th Street South
    Saint Petersburg, FL
    United States

    727-502-8000 (voice)
    gs-g-spcmsc_data_inquiries@usgs.gov
  2. What's the catalog number I need to order this data set? 1D_variation_results.nc
  3. What legal disclaimers am I supposed to read?
    This publication was prepared by an agency of the United States Government. Although these results have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of these results on any other system, nor shall the act of distribution imply any such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of these results described and (or) contained herein. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 14-Aug-2024
Metadata author:
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center
Attn: USGS SPCMSC Data Management
600 4th Street South
Saint Petersburg, FL
United States

727-502-8000 (voice)
gs-g-spcmsc_data_inquiries@usgs.gov
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://cmgds.marine.usgs.gov/catalog/spcmsc/Navassa_1D_metadata.faq.html>
Generated by mp version 2.9.51 on Wed Oct 2 16:18:09 2024