Journal ArticleDOI
A study on the utilization of sir‐a data for population estimation in the eastern part of Spain
J. Meliá,J.A. Sobrino +1 more
TLDR
In this paper, a study has been carried out in order to estimate population on a strip of land of 100 km length and 50 km width, placed in the Eastern part of Spain.Abstract:
In this work a study has been carried out in order to estimate population on a strip of land of 100 km length and 50 km width, placed in the Eastern part of Spain. We have made use of a SIR‐A image obtained from the Columbia shuttle on November 1981 and referred to the mentioned area. It is shown the difficulty of estimating population in coast nuclei due to the large number of touristic buildings which deceive the population census. Nuclei with less than 2000 people may be identified in many cases but it is hardly difficult to estimate their surface. With the remaining nuclei we have carried out a twofold classification according to the number of people. The surface of semi‐urban nuclei, of less than 10,000 people show a dependency with the number of people between three and four times below to that of urban nuclei of more than 20,000 people.read more
Citations
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SAR applications in human settlement detection, population estimation and urban land use pattern analysis: a status report
F.M. Henderson,Zong-Guo Xia +1 more
TL;DR: A status report on the applications of SAR in settlement detection, population estimation, assessment of the impact of human activities on the physical environment, mapping and analyzing urban land use patterns, and interpretation of socioeconomic characteristics is presented.
Journal ArticleDOI
Geomorphological signatures: classification of aggregated slope unit objects from digital elevation and remote sensing data
TL;DR: In this article, the concept of a geomorphological signature is developed for classifying and mapping slope units with an automated procedure for analysing digital elevation and remote sensing data, and a ten-class scheme is used to classify slope units for a study area in southwest Yukon, Canada.
Journal ArticleDOI
Urban population estimation based on residential buildings volume using IKONOS-2 images and lidar data
Livia Tomas,Leila Maria Garcia Fonseca,Cláudia Maria de Almeida,Fernando Leonardi,Madalena Niero Pereira +4 more
TL;DR: In this article, the authors present a methodological approach to estimate urban population using the volume of single houses and high-rise residential buildings obtained from an IKONOS-2 ortho-image and light detection and raging (lidar) data.
Journal ArticleDOI
Nature of sedimentary deposits in the western Makgadikgadi basin, Botswana
TL;DR: Thematic Mapper imagery interpretation, combined with field evidence, has led to the identification of geomorphological features which are mainly composed of light grey calcareous sandstones (formerly calcretes) overlain by dark grey sands as mentioned in this paper.
Journal ArticleDOI
Fine-scale population estimation: how Landsat ETM+ imagery can improve population distribution mapping
Guiying Li,Qihao Weng +1 more
TL;DR: In this article, the spectral response based and land use based methods were compared for population estimation with Landsat Enhanced Thematic Mapper Plus (ETM+) imagery for Marion County, Indiana, USA.
References
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Journal ArticleDOI
Subsurface Valleys and Geoarcheology of the Eastern Sahara Revealed by Shuttle Radar
John F. McCauley,Gerald G. Schaber,Carol S. Breed,M. J. Grolier,C. V. Haynes,B. Issawi,Charles Elachi,R. Blom +7 more
TL;DR: The shuttle imaging radar (SIR-A) carried on the space shuttle Columbia in November 1981 penetrated the extremely dry Selima Sand Sheet, dunes, and drift sand of the eastern Sahara, revealing previously unknown buried valleys, geologic structures, and possible Stone Age occupation sites.
Journal ArticleDOI
Spaceborne Radar Subsurface Imaging in Hyperarid Regions
TL;DR: In this article, a simple backscatter model was proposed to show that for a low-loss thin sand layer, the presence of the covering layer enhances the capability to image the subsurface interface, particularly at large incidence angles and HH polarization.
Sir: a computer program for semantic information retrieval
TL;DR: The author describes how this ability to "understand" semantic information was developed and how the basic features of SIR compare with those of other systems, and proposes a next step to construct a more general system which is less complex and yet more powerful than SIR.
Journal Article
Detection of lowland flooding using active microwave systems.
TL;DR: In the case of an interpreter accustomed to photographic or visible/infrared images, an evaluation of radar images presents some problems, because the radar is sensing a set of surface characteristics which have little influence on visible or infrared systems.
Space Shuttle Columbia views the world with imaging radar: The SIR-A experiment
TL;DR: In this article, the authors demonstrate the capability of this microwave remote sensor system to perceive and map a wide range of different surface features around the Earth, including geology, hydrology, agriculture, forest cover, ocean surface features, and prominent man-made structures.