XXII ISPRS Congress 2012: Technical Commission VIII

Shortis, M.; Shimoda, H.; Cho, K.

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Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663822514

Title:: Technical Commission VIII

Scope:: 590 Seiten

Year of publication:: 2014

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663822514

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Shortis, M.; Shimoda, H.; Cho, K.

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VIII/6: Agriculture, Ecosystems and Bio-Diversity]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: SPECTRAL CHARACTERISTICS OF SELECTED HERMATYPIC CORALS FROM GULF OF KACHCHH, INDIA Nandini Ray Chaudhury

Document type:: Multivolume work

Structure type:: Chapter

in the NIR region (Green et al. 2000) with central maxima at 820 nm and a secondary peak at 1070 nm in the MIR region. The live corals exhibited “brown mode” of coral reflectance with triple- peaked pattern in the visible region. All spectra have a characteristic spike located at 760 to 762 nm due to the presence of atmospheric oxygen. The coral spectra are characterized by two distinct absorption features located at 675 nm (chlorophyll absorption) and 975 nm (water absorption). The absorption band depth at 975 nm is a function of the depth of water column and water column does suppress the reflectance magnitude. Ripples on moving water column drastically change the spectral shape of corals at 840 nm. The live and the bleached coral spectra can be well distinguished in the 400 to 600 nm region. The relative exposure of coral polyps and corallite structure can be a major determinant in the spectral behaviour of the corals at colony scale. The first and second order derivatives can be employed to identify common reflectance and absorption regions of the coral targets along with potential region(s) of separation between live and bleached corals. Live and bleached corals get differentiated with first-order derivatives at 631 and 647 nm while 680 to 700 nm window show their clear separation with second-order derivatives However, bleached coral target needs to be sampled more in order to strengthen these observations. Derivative analysis needs to be investigated in depth and with more number of samples to comment on the spectral separability of the coral targets. 6. REFERENCES References from Journals: Clark, C. D., Mumby P.J., Chisholm, J.R.M., Jaubert, J. and Andrefouet, S. 2000. Spectral discrimination of coral mortality states following a svere bleaching event. International Journal of Remote Sensing, 21(11), pp. 2321-2327. Hedley J.D. and Mumby, P.J. 2002. Biological and remote sensing perspectives of pigmentation in coral reef organisms. Advances in Marine Biology, 43, pp.277-317 Hochberg, E.J. and Atkinson M.J. 2000. Spectral discrimination of coral reef benthic communities. Coral Reefs, 19, pp. 164-171 Hochberg, E.J. and Atkinson M.J. 2003. Capabilities of remote ensors to classify coral, algae and sand as pure and mixed spectra. Remote Sensing of Environment 85 pp. 174-189 Hochberg, E.J., Atkinson, M. J. and Andréfouët, S. 2003. Spectral reflectance of coral reef bottom-types worldwide and implications for coral reef remote sensing. Remote Sensing of Environment 85 pp. 159-173 Hochberg, E.J., Atkinson, M. J., Apprill, A. and Andréfouët, S. 2004. Spectral reflectance of coral. Coral Reefs, 23, pp. 84-95 Holden, H. and LeDrew, E. 1998. Spectral discrimination of healthy and non-healthy corals based on cluster analysis, principal components analysis and derivative spectroscopy. Remote Sensing of Environment 65 pp. 217-224. Holden, H. and LeDrew, E. 1999, Spectral identification of coral reef features. International Journal of Remote Sensing, 20(13), pp. 2545-2563. Joyce, K. E. and Phinn, S.R., 2002. Bi-directional reflectance of corals. International Journal of Remote Sensing, 23(2), pp. 389- 394. Joyce, K. E. and Phinn, S.R., 2003. Hyperspectral analysis of chlorophyll content and photosynthetic capacity of coral reef substrates. Limnology and Oceanography, 48(1, part 2), pp. 489- 496. Kutser, T., Dekker, A.G. and Skirving, W. 2003. Modeling spectral discrimination of Great Barrier Reef benthic communities by remote sensing instruments. Limnology and Oceanography, 48(1, part 2), pp. 497-510. Lubin, D. Li, W., Dustan, P., Mazel, C.H., and Stamnes K. 2001. Spectral signatures of coral reefs: features from space. Remote Sensing of Environment 75 pp. 127-137 Patel, M.I. 1978. Generic diversity of scleractinians around Poshetra Point, Gulf of Kutch. Indian Journal of Marine Sciences, 7, pp. 30-32 References from Books: Green, E.P., Mumby, P.J., Edwards, A.J., Clark, C.D. (eds. AJ. Edwards). 2000. Remote sensing handbook for tropical coastal management: Coastal management sourcebooks 3, UNESCO, Paris. Navalgund R. R., Ajai, Bahuguna A., Ray Chaudhury N., Bhattji N.S., Madhupriya N., Sharma S., Parihar J.S., Panigrahi S. Chakraborty, M., Dwivedi, R.M., Ramdass S. and Swaroop P (2010): Coral Reef Atlas of The World Vol.1 Central Indian Ocean, Space Applications Centre, (ISRO), Ahmedabad, p: 282. Venkataraman, K., Satyanarayana, Ch., Alfred, J.R.B. and Wolstenholme, J. 2003. Handbook on Hard Corals of India, Zoological Survey of India, Kolkata, p: 266 References from websites: Goodman J.A. and Ustin S.L. 2002. Acquisition of underwater reflectance measurements as ground truth. ftp://popo.jpl.nasa.gov/pub/docs/workshops/02.../2002 Goodman _web.pdf 7, ACKNOWLEDGEMENTS This study presents the preliminary results of the work being carried out under Optical Characterization of Coral Reef Diversity Project under Meteorology and Oceanography Programme of Space Applications Centre, ISRO. The author is thankful to Director, Space Applications Centre and Dr. J. S. Parihar, Deputy Director, EPSA for overall technical guidance and support for this study. The work has been carried out in collaboration with GEER Foundation, Gandhinagar. The author sincerely acknowledges the contribution of all the members of project team of GEER Foundation and Space Applications Centre, ISRO.

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