members-wv2-princesscays-multi-pan-4

Bathymetry and water column correction
WorldView 2 image Princess Cays, Eleuthera island, Bahamas
November 11th 2011, 2 m ground resolution
image from Digital Globe
"(c) DigitalGlobe, Inc. All Rights Reserved"
"Includes copyrighted material of DigitalGlobe, Inc., All Rights Reserved"
work done in 2012, 2013 and 2014
The "PAN solution"
uses the PANCHRO bans, 4*4 sum-aggregated and co-registered
bands 1, 2, 3, Panchro, 4, 5, 6, 7 and 8 become bands 1, 2, 3, 4, 5, 6, 7, 8 and 9
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Running the bottom typing process

Step 1 Bottom typing step 1 more ROIs must be specified to sample unclassified areas	Step 1 8 bottom type ROIs have been specified inside the MBES area and applied over the whole image, using a relatively restrictive bottom typing rule Statistics inside the MBES area (white rectangle) 56.192% Classified Shallow bottoms 79259 pixels 17.104% in type_11 B=128.4 46651 pixels 10.067% in type_10 B=165.1 45245 pixels 9.764% in type_20 B=107.2 42444 pixels 9.160% in type_21 B= 89.8 26100 pixels 5.632% in type_22 B= 67.4 9213 pixels 1.988% in type_23 B= 55.3 6130 pixels 1.323% in type_24 B= 48.5 5343 pixels 1.153% in type_25 B= 41.3 24.218% Unclassified Shallow bottoms all bottom types have been identified by relaxing the bottom typing rules, a final bottom type map is obtained
CoefSIGC=1.5 is restrictive 25% of shallow bottoms are unclassified	CoefSIGC=3.5 is much less restrictive a final map is obtained
Step 2 11 ROIs have been added CoefSIGC=1.5 is restrictive 25% of shallow bottoms are unclassified	Step 2 11 ROIs have been added CoefSIGC=3.5 is much less restrictive 3.5% of shallow bottoms are unclassified Final bottom type map
Purple tones possibly denote coral bottoms Green tones possibly denote various densities of seagrass/algae bottoms Yellow tones possibly denote sandy bottoms with very few seagrass	Final statistics for the whole image 8058186 pixels in Type_0: 23.554% Land area 1192894 pixels in Type_1: 3.487% Unclassified Shallow bottoms 12918495 pixels in Type_2: 37.760% Optically Deep water 0..............pixels in Type_3: 0.000% No Data area 0..............pixels in Type_4: 0.000% Wave Breaker area 1380198 pixels in Type_5: 4.034% Cloud/Shadow area 10661928 pixels in Type>5: 31.165% Classified Shallow bottoms 1658603 pixels 4.848% in type_23 B= 67.4 1213658 pixels 3.547% in type_21 B= 89.8 1123608 pixels 3.284% in type_11 B=128.4 1053932 pixels 3.081% in type_24 B= 55.3 995235 pixels 2.909% in type_20 B=101.1 773305 pixels 2.260% in type_25 B= 48.5 755972 pixels 2.210% in type_10 B=165.1 644772 pixels 1.885% in type_30 B= 41.4 566816 pixels 1.657% in type_22 B= 83.2 512269 pixels 1.497% in type_33 B= 25.7 462904 pixels 1.353% in type_26 B= 42.0 351053 pixels 1.026% in type_31 B= 30.5 268505 pixels 0.785% in type_27 B= 39.2 164876 pixels 0.482% in type_12 B=121.5 116420 pixels 0.340% in type_28 B= 33.6

Bottom type signatures

Type 10	Type 11		Type 12
Type 20	Type 21	Type 22	Type 23
Type 24	Type 25	Type 26	Type 27 Type 28
Type 30	Type 31	Type 32	Type 33 Type 34

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