Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

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

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

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:: [THP-5 IMAGE INTERPRETATION AND ANALYSIS]

Document type:: Multivolume work

Structure type:: Chapter

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Title:: THE INDIAN REMOTE SENSING SATELLITE (IRS-1A) AND ITS APPLICATION POTENTIALS. MG Chandrasekhar, V Jayaraman, K Radhakrishnan, CBS Dutt, B Manikiam, PP Nageswara Rao

Document type:: Multivolume work

Structure type:: Chapter

So far IRS-1A has provided more than 2 lakh high quality data products of which 50,000 products have been effectively used in various applications of natural resources, cartography, environment, engineering applications and coastal oceanography. The data products are available in a variety of formats, ranging from 70 mm "quick look" film products (level 0) to user-specified digitally enhanced special products (level 4) (DOS, 1989). 1.3 Information content and planimetric fidelity of IRS-1A data Analysis were carried out to compare the information content of IRS LISS-II data with SPOT and Landsat-TM bands. Statistical techniques viz., Entropy, Principal Component Analysis and Correlation Analysis were performed. The results indicate that (i) with respect to Entropy and percentage of information content for visible channels of LISS-II data was found marginally superior to the SPOT and TM data and with respect to NIR channel data, all the three data sets performed equally (ii) correlation analysis indicated similar correlation between bands of all the 3 sensors (iii) PC results showed that information content in PC-1 of LISS-II was higher (81%) than the information content of PC-1 of SPOT (67%) and PC-1 of TM data (74%) (Table 2 & 3) (Bhan, et.al, 1989). TABLE - 2 : ENTROPY AND PERCENTAGE OF INFORMATION Sensors Blue Spectral Channels Green Red NIR Maximum possi ble Entropy SPOT-XS 1.99 4.33 4.72 7.99 (49.94) (54.19) (50.07) LS-TM 4.56 3.9 4.54 4.85 7.99 (57.07) (48.81) (56.82) (60.8) IRS-1A 4.54 4.26 4.96 4.17 7.00 (64.86) (60.86) (70.86) (59.57) TABLE - 3 : MATRIX OF CORRELATION COEFFICIENTS Sensor Bands 1 2 3 4 SPOT-XS 1 1 2 0.96 1 3 0.09 o 0 1 1 - LS-TM 1 1 2 0.90 1 3 0.91 0.95 1 4 -0.25 -0.08 -0.21 1 IRS-1A 1 1 LISS-II 2 0.97 1 3 0.92 0.94 1 4 -0.19 -0.04 -0.11 1 In the field of cartography it has been observed that LISS-II data with regard to planimetric fidelity is as accurate as Landsat TM and SPOT. The rectified resampled IRS LISS-II is found useful as a stereo-mate with high angle SPOT data. For the purpose of map updating, it is found 75% of the roads could be transferred on 1:50,000 scale using IRS-1A LISS-II data. (Kesavaswamy, 1988, Dutt, 1988, Rajashree, 1988, Srivastava, 1988). Thus information content of the IRS-1A LISS-I data was found comparable with Landsat MSS and Landsat TM with comparable spectral bands data, the clarity and sharpness of features are found better on IRS-1A data due to better radiometric quality and higher S/N ratio of the IRS-1A data. 2.0 APPLICATION POTENTIALS OF IRS-1A DATA With such high quality of data available from IRS-1A sensors, numerous application studies have been carried out. The potential applications of IRS data has been tested for a wide range of natural resources applications including agriculture, cartography, environment, coastal oceanography, flood management, desert advancement, river morphology etc. Presently 70% of the user demands in India are met through IRS-1A data and it is constantly on the increase. The results presented herein are based on the case studies carried out during the last two years to evaluate the suitability of IRS-1A data with that of Landsat MSS, TM and SPOT data 738

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