Demonstration project

Report created: 03-Feb-2006 16:22:17

Report template: Default

Report contents:


Project information

Project file C:\Documents and Settings\gydjg2\project3.dgp
Number of images in project 3
Project owner Dr Expert, Gravel Section, River-Bed Consultants Ltd
Client Tutorial
Project created 28-Oct-2005 15:46:47
Project last saved 27-Jan-2006 17:20:47
Notes This is my first Digital Gravelometer project


Image information

Number of images analysed: 3

Site name/Sample ID Example river: 1
Image filename C:\ Documents and Settings\ gydjg2\ sample_image_1.jpg
Photograph taken 00-Jan-0000
Image size (pixels) 2048 x 1536
Controlled area (mm) 1270 x 950
Photographer Dr Expert
Exposure (sec) 1/200
Aperture 4.0
Focal length (mm) 8.0
35mm equiv. focal length (mm) Unknown
ISO equivalent 100
Flash used Yes
Camera make OLYMPUS OPTICAL CO.,LTD
Camera model C3030Z
Notes Sample image 1


Processing information

Site name/Sample ID Example river: 1
Measurement date/time 03-Feb-2006 16:17:24
Measurement duration (secs) 112.5739
Operator Dr Expert
Default/custom processing options Default
Radial lens correction None
Pixels per mm 1.4078
Structuring element size (pixels) 15
Threshold values (%) 35, 1
Median filter size (pixels) 5
Minima Suppression 1
Boundary parameters - include grains along edges: top, left


Grain-size information (Example river: 1)

Data presented as: Area-by-number (equivalent to a paint-and-pick sample)

Data presented as: Percent finer than

Square-hole sieve correction factor: 0.79

Lower truncation: 4 Psi

Upper truncation: None

Grain-size percentiles

Percentile mm Phi Psi
5 16.59 -4.05 4.05
16 18.01 -4.17 4.17
25 19.54 -4.29 4.29
50 26.71 -4.74 4.74
75 36.71 -5.20 5.20
84 44.98 -5.49 5.49
95 61.50 -5.94 5.94
100 98.79 -6.63 6.63

Distribution statistics

  Moment statistics Folk and Ward inclusive graphical statistics
  Logarithmic Geometric Arithmetic Logarithmic Geometric
Mean -4.81 Phi 4.81 Psi 27.99 mm 30.71 mm -4.80 Phi 4.80 Psi 27.87 mm
Sorting 0.60 Phi 0.60 Psi 1.51 mm 14.57 mm 0.62 Phi 0.62 Psi 1.53 mm
Skewness -0.62 -0.62 -0.62 1.54 -0.21 -0.21 -0.21
Kurtosis 2.57 2.57 2.57 5.65 0.85 0.85 0.85

Note: Positive skewness values indicate fine skew (i.e. a tail of fine particles).

Data

Size (finer than / passing sieve) Count in class Percent in class Cumulative percent finer than
mm Phi Psi
16.00 -4.00 4.00 0.00 0.00 0.00
19.03 -4.25 4.25 69.00 22.48 22.48
22.63 -4.50 4.50 51.00 16.61 39.09
26.91 -4.75 4.75 34.00 11.07 50.16
32.00 -5.00 5.00 49.00 15.96 66.12
38.05 -5.25 5.25 35.00 11.40 77.52
45.25 -5.50 5.50 20.00 6.51 84.04
53.82 -5.75 5.75 26.00 8.47 92.51
64.00 -6.00 6.00 10.00 3.26 95.77
76.11 -6.25 6.25 8.00 2.61 98.37
90.51 -6.50 6.50 4.00 1.30 99.67
107.63 -6.75 6.75 1.00 0.33 100.00

Wentworth size classes

Wentworth size class Percent in class
Boulder (>256 mm) 0.00
Cobble (64 mm - 256 mm) 4.23
Pebble (4 mm - 64 mm) 95.77
Granule (2 mm - 4 mm) 0.00
Sand (<2 mm) 0.00

Grain-size distribution plot

Grain-size distribution plot

Report generated by Sedimetrics Digital Gravelometer (http://www.sedimetrics.com/).