Entity_Type:
Entity_Type_Label: 1D_variation_results.nc
Entity_Type_Definition: None
Entity_Type_Definition_Source: None
Attribute:
Attribute_Label: eps
Attribute_Definition:
The series of observation scales used to determine the average variations in elevation extremes.
Attribute_Definition_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.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 100
Attribute_Units_of_Measure: Meters
Attribute:
Attribute_Label: rows
Attribute_Definition:
Labels for the rows of the grid used to subdivide the study site.
Attribute_Definition_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.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 12
Attribute:
Attribute_Label: columns
Attribute_Definition:
Labels for the columns of the grid used to subdivide the study site.
Attribute_Definition_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.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: A
Range_Domain_Maximum: I
Attribute:
Attribute_Label: angles
Attribute_Definition:
Angular orientation of the transects extracted from a given grid cell.
Attribute_Definition_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.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 345
Attribute_Units_of_Measure: Degrees
Attribute:
Attribute_Label: avg_variations
Attribute_Definition:
Average variations in elevation extremes as a function of the observation scale, eps.
Attribute_Definition_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.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.047
Range_Domain_Maximum: 25.44
Attribute_Units_of_Measure: Meters
Attribute:
Attribute_Label: fractal_dims
Attribute_Definition:
Fractal dimension estimates for the transects in each grid cell.
Attribute_Definition_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.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.0
Range_Domain_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)