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

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Multivolume work

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:: [WA-3 DEMOGRAPHIC AND URBAN APPLICATIONS]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: AN ANALYSIS OF SETTL EMENT DEI EOT ABILI! Y IN CENTRAL EUROPE USING SIR-B RADAR IMAGERY. Dr. Floyd M. Henderson

Document type:: Multivolume work

Structure type:: Chapter

Freiburg. The author also stated his familiarity with the area helped minimize confusion errors in this instance. This area of southwest Germany was also analyzed by Schmidt (1986) using VV-polarized X-band and L-band airborne SAR imagery. Depending upon the kind and groups of buildings present, the author found a more-or-less regular pattern that was easily visible on the X-band imagery. He also stated that isolated buildings were visible on the L-band scene. Unfortunately, no elaboration of these points were given. Sieber and Hartl (1986) classified land cover as one part of a SIR-B data observation experiment of the Freiburg, Germany, area. Using three paths or data takes they concluded that the steep incidence angle path (18 degrees) most significantly discriminated among classes that included settlements as a category. Incidence angle was considered to influence discrimination of land use classes more than the aspect angle. Aside from their mention of three cities no measure of accuracy or pixel/sample size was provided. Trevett (1986) reported on a project to survey land use and vegetation in Nigeria using a real aperture X-band airborne system and two look directions. In the northern arid regions of the country, villages could not be distinguished as the mud huts and grass roofs gave a signal response similar to the surrounding grassland. In the southern, more humid forested areas of the country villages were detected as the corrugated iron roofs of village dwelling gave a bright response that contrasted with the surrounding cover. Imhoff, et.al. (1987) used SIR-B imagery as part of a project to survey flood boundaries in Bangladesh. Using imagery with a 46 degree incidence angle a classification accuracy of 83 per cent for a combined settlement-dike category was attained. Data on omission errors (12 of 75 villages) and commission errors (13 agricultural areas were mis-identified as villages) were also included in the report. The authors stated that the raised elevation of the dikes and corner reflection from buildings against a background of nonturbulent water in the surrounding rice fields abetted visibility. Of note is the fact that these dwellings were also made of thatch. This contrast to the above mentioned results of Trevett in Nigeria indicates that the change in the terrain background may be a significant factor in settlement detection of the same building type. It is apparent that few investigations have given attention specifically to settlement detection and reasons for variation in the results. Fewer still provide quantitative data. Many include only a passing, general reference to settlement detection as a side light to broader or other-topic focussed research. In an attempt to broaden the understanding of these radar/terrain relationships, this study examines effects of environment (target/background contrast), radar incidence angle, and to some degree, look direction on settlement detection. STUDY AREA AND IMAGERY L-band, like-polarized (HH) SIR-B imagery of southern and southwestern Germany and northeastern France was recorded on three data takes in October, 1984. Relevant parameters of these data are listed in Table I. As can be 205

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