GeoIS-EM Home         Mound sidescan sonar data processing, analysis and visualization: quantitative results

The GIS data processing is performed for the USACE project: Monitoring Processes and the Fate of a Mixed-Sediment Mound at the Cape Fear River, NC

April 2001, given gridded data
Minimum -17.28
Maximum	 -6.39

April 2001, smoothing 0.1
Number of cells: 301895
Minimum: -14.0209970474
Maximum: -6.3994255066
Range:  7.62157
Arithmetic Mean:  -10.8148
Variance:  2.69283
Standarddeviation: 1.64098
Variation coefficient: -15.1735 %

April 2001, smoothing 6.0
Number of cells: 301895
Minimum: -13.1749572754
Maximum: -6.5774765015
Range:  6.59748
Arithmetic Mean:  -10.8168
Variance:  2.65822
Standarddeviation: 1.63041
Variation coefficient: -15.0729 %

Difference between elapr01.t300s6-elapr01.def
Number of cells: 301895
Minimum: -1.1480183601
Maximum: 1.3330974579
Range:  2.48112
Arithmetic Mean:  -0.00193726
Variance:  0.0126144
Standarddeviation: 0.112314

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January 2002, given gridded data
Minimum -16.84	       
Maximum -6.68

January 2002 smoothing 0.1
Number of cells: 301895
Minimum: -13.5772418976
Maximum: -6.5845646858
Range:  6.99268
Arithmetic Mean:  -10.7038
Variance:  2.3848
Standarddeviation: 1.54428
Variation coefficient: -14.4274 %

January 2002 smoothing 6.0
Number of cells: 301895
Minimum: -12.9926710129
Maximum: -7.1868805885
Range:  5.80579
Arithmetic Mean:  -10.7036
Variance:  2.36453
Standarddeviation: 1.5377
Variation coefficient: -14.3662 %

Difference between surfaces with sm 0.1 and 6
eljan02.t300s6-eljan02.def
Number of cells: 301895
Minimum: -1.018078804
Maximum: 1.3356971741
Range:  2.35378
Arithmetic Mean:  0.000173889
Variance:  0.00970363
Standarddeviation: 0.098507


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Difference between April 2001-January 2002

no smoothing
Number of cells: 301895
Minimum: -1.739812851
Maximum: 1.7071123123
Range:  3.44693
Arithmetic Mean:  -0.111043
Variance:  0.102593
Standarddeviation: 0.320301

Difference in volume
r.sum dif.def
SUM = -33523.44m x 0.25m2 = 8380 cubic m

smoothed data
Number of cells: 301895
Minimum: -1.0667495728
Maximum: 0.8147325516
Range:  1.88148
Arithmetic Mean:  -0.113155
Variance:  0.0702765
Standarddeviation: 0.265097

gain computed from smoothed data
Number of cells: 74582
Minimum: 0.000005722
Maximum: 0.8147325516
Range:  0.814727
Arithmetic Mean:  0.242251
Variance:  0.0334215
Standarddeviation: 0.182815
Variation coefficient: 75.4654 %

loss computed from smoothed data
Number of cells: 227313
Minimum: -1.0667495728
Maximum: -0.000002861
Range:  1.06675
Arithmetic Mean:  -0.229764
Variance:  0.0273274
Standarddeviation: 0.16531
Variation coefficient: -71.9477 %

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Slopes

April 2001 from smoothed surface
Number of cells: 301895
Minimum: 0.0045866212
Maximum: 9.2485160828
Range:  9.24393
Arithmetic Mean:  2.53977
Variance:  2.77852
Standarddeviation: 1.66689
Variation coefficient: 65.6314 %

Januar 2002 from smoothed surface
Number of cells: 301895
Minimum: 0.0051474334
Maximum: 6.4069213867
Range:  6.40177
Arithmetic Mean:  2.26696
Variance:  1.67368
Standarddeviation: 1.29371
Variation coefficient: 57.068 %






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