Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

damen, m. c. j.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856662364

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: VI, Seiten 959-1074

Year of publication:: 2016

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856662364

Signature of the source:: ZS 312(26,7,3)

Language:: English

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

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: Closing ceremony

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Working Group 3: Spectral signatures of objects. Liaison: N. J. J. Bunnik

Document type:: Multivolume work

Structure type:: Chapter

Symposium on Remote Sensing for Resources Development and Environmental Management/Enschede/August 1986 © 1987Balkema, Rotterdam. ISBN 90 6191 674 7 1057 Working Group 3: Spectral signatures of objects N.J.J.Bunnik Liaison The field of interest of Working Group III deals with research into methods for the extraction of object properties from remotely sensed data. These data can be acquired by multispectral, ther mal infrared and microwave sensors. The extraction process is based on the use of deterministic or phy sical models and object property estimators. Besides the use of (spectral) data as input, also other (non-spectral) object data are required for a quan titative assessment of object properties. At the symposium only papers dealing with multi spectral or thermal infrared data have been presen ted during the 6 sessions of Working Group III. Those papers on microwave remote sensing have been presented during the sessions of Working Group II. The total number of expected presentations for Working Group III was 29. During the symposium 25 papers were presented. The presentations could be subdivided into the following three categories: 1. Development and use of interaction models. 2. Development of methodologies for: - data interpretation - experimental measurements 3. Research on new remote sensing methods. The conclusions and recommendations with respect to the work presented within these categories can be summarized as follows. 1.1 Two types of models have been presented: - descriptive models used to study radiation inter action processes as a function of changing vegeta tion and soil parameters and for special observation conditions like the hot-spot. - simple models required for practical applications in agriculture. 1.2 It was recommended to develop assimilation tech niques based on the use of remote sensing models, crop growth models and field observations for the purpose of production estimation. 1.3 For practical applications in crop growth and crop condition monitoring, simplified interaction models should be further developed in order to vali date the estimation of significant crop parameters from spectral data (development stage, soil cover, leaf area index). 2.1 With regard to development of methodologies for data interpretation further work has been presented on multispectral and multitemporal classification, atmospheric corrections, feature analysis and the combined use of geographical and spectral informa tion. 2.2 Well documented experiments have been reported within two different objectives: - to improve the understanding of different radia tion interaction mechanisms - to develop methods for the assessment of different factors related with crop vitality. 2.3 Simplified methods were presented for low cost spectral measurements by means of (calibrated) pho tography from ultralight aircraft and ground level (only valid for a limited area). 2.4 In the near future a workshop should be held on radiometric measurements with a review of existing methods, on standardization and on training of users. 2.5 More attention should be paid to the statistical significance of ground measurements related to data collected by sampling. 3.1 New results have been presented on the potential of hot spot measurements for the characterisation of vegetation. The use of a laser system has been demonstrated to determine vegetation density and height profiles. 3.2 Within the scope of Working Group III it should be investigated further to which extent active measurements in the optical part of the spectrum can add new capabilities for the extraction of object properties.

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