with WorldView2 Image Data Litia Gaunavou Wolf Forstreuter African tulip Spathodea campanulata History and Problem Imported as ornamental tree Grows in abandoned farms Grows in forest ID: 660832
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Slide1
Mapping of African Tulipwith WorldView-2Image Data
Litia
GaunavouWolf ForstreuterSlide2
African tulipSpathodea campanulata Slide3
History and ProblemImported as ornamental treeGrows in abandoned farmsGrows in forest openingsCompetition to local speciesVery light wood not usable ?Not mapped in Fiji Slide4
Mapping PurposeIndicator for forest degradationEltech Fiji Limited utilises the timber for energy productionSlide5
Flowering SeasonAugust - NovemberSlide6
African Tulip Grows in GroupsMapping scale 1:10,000 requiredSlide7
Natural ColourBands: 5,3,2 EnhancedSlide8
Absorption and Reflection of Leaves
1 green light
2 blue light and
red light
3 near infrared Slide9
Bands: 7,5,3 Enhanced Infra - RedSlide10
Image CaptureJuly - November too short to get cloud free imagesSpectral signature of leave reflection must be investigatedSlide11
WorldView-2 ImageNormal view (Google Earth)Slide12
Landsat Image DataSlide13
WorldView-2 ImageNatural colour combination enhancedSlide14
WoldView-2 ImageFalse colour IR combination, African tulip is visibleSlide15
Target: Spectral SignaturesSlide16
Spectral Signatures African Tulip & other ForestWorldView-2 Bands
ReflectanceSlide17
Classification of Test AreasData
AfricanTul
AfricanTul
Forest1
Forest2
Forest3
AfricanTul
100.00
3.57
0.39
0.48
0.34
AfricanTul
0.00
85.71
1.52
1.83
2.90
Forest1
0.00
0.00
57.92
18.42
13.21
Forest2
0.00
7.14
23.60
60.91
17.73
Forest3
0.00
3.57
16.57
18.36
65.81Slide18
SummaryMapping of African tulip is possible also outside the flowering seasonMapping requires image data for 1:10,000 scaleMapping requires image enhancement not possible with Google Earth screen dumps!Slide19
Thanks …